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Sigma Labs, Inc. – ‘10-Q’ for 3/31/21 – ‘EX-101.LAB’

On:  Thursday, 4/22/21, at 4:05pm ET   ·   For:  3/31/21   ·   Accession #:  1493152-21-9466   ·   File #:  1-38015

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 4/22/21  Sigma Labs, Inc.                  10-Q        3/31/21   44:2.7M                                   M2 Compliance LLC/FA

Quarterly Report   —   Form 10-Q
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML    199K 
 2: EX-31.1     Certification -- §302 - SOA'02                      HTML     18K 
 3: EX-31.2     Certification -- §302 - SOA'02                      HTML     18K 
 4: EX-32.1     Certification -- §906 - SOA'02                      HTML     15K 
11: R1          Document and Entity Information                     HTML     43K 
12: R2          Condensed Balance Sheets (Unaudited)                HTML    124K 
13: R3          Condensed Balance Sheets (Unaudited)                HTML     32K 
                (Parenthetical)                                                  
14: R4          Condensed Statements of Operations (Unaudited)      HTML    105K 
15: R5          Statement of Stockholders' Equity (Unaudited)       HTML     90K 
16: R6          Condensed Statements of Cash Flows (Unaudited)      HTML    100K 
17: R7          Summary of Significant Accounting Policies          HTML     38K 
18: R8          Inventory                                           HTML     20K 
19: R9          Deferral of Social Security Tax Payments            HTML     17K 
20: R10         Derivative Liability                                HTML     27K 
21: R11         Stockholders' Equity                                HTML     76K 
22: R12         Subsequent Events                                   HTML     17K 
23: R13         Summary of Significant Accounting Policies          HTML     49K 
                (Policies)                                                       
24: R14         Summary of Significant Accounting Policies          HTML     38K 
                (Tables)                                                         
25: R15         Inventory (Tables)                                  HTML     20K 
26: R16         Derivative Liability (Tables)                       HTML     25K 
27: R17         Stockholders' Equity (Tables)                       HTML     59K 
28: R18         Summary of Significant Accounting Policies          HTML     21K 
                (Details Narrative)                                              
29: R19         Summary of Significant Accounting Policies -        HTML     17K 
                Schedule of Warrant Liability Measured on                        
                Recurring Basis (Details)                                        
30: R20         Summary of Significant Accounting Policies -        HTML     20K 
                Schedule of Derivative Liability Measured on a                   
                Recurring Basis Using Significant Unobservable                   
                Input (Level 3) (Details)                                        
31: R21         Summary of Significant Accounting Policies -        HTML     24K 
                Schedule of Antidilutive Securities Excluded from                
                Computation of Earnings Per Share (Details)                      
32: R22         Summary of Significant Accounting Policies -        HTML     22K 
                Schedule of Earnings Per Share, Basic and Diluted                
                (Details)                                                        
33: R23         Inventory - Schedule of Inventory (Details)         HTML     23K 
34: R24         Deferral of Social Security Tax Payments (Details   HTML     21K 
                Narrative)                                                       
35: R25         Derivative Liability (Details Narrative)            HTML     27K 
36: R26         Derivative Liability - Schedule of Fair Value of    HTML     26K 
                Derivative Liability Using Black Scholes Valuation               
                Model (Details)                                                  
37: R27         Derivative Liability - Schedule of Fair Value of    HTML     23K 
                Warrant Liability (Details)                                      
38: R28         Stockholders' Equity (Details Narrative)            HTML    167K 
39: R29         Stockholders' Equity - Schedule of Share-based      HTML     31K 
                Payment Award, Stock Options, Valuation                          
                Assumptions (Details)                                            
40: R30         Stockholders' Equity - Schedule of Stock Option     HTML    101K 
                Activity (Details)                                               
41: R31         Stockholders' Equity - Summary of Warrant Activity  HTML     40K 
                (Details)                                                        
43: XML         IDEA XML File -- Filing Summary                      XML     74K 
42: EXCEL       IDEA Workbook of Financial Reports                  XLSX     50K 
 5: EX-101.INS  XBRL Instance -- sglb-20210331                       XML    722K 
 7: EX-101.CAL  XBRL Calculations -- sglb-20210331_cal               XML    122K 
 8: EX-101.DEF  XBRL Definitions -- sglb-20210331_def                XML    314K 
 9: EX-101.LAB  XBRL Labels -- sglb-20210331_lab                     XML    741K 
10: EX-101.PRE  XBRL Presentations -- sglb-20210331_pre              XML    495K 
 6: EX-101.SCH  XBRL Schema -- sglb-20210331                         XSD    116K 
44: ZIP         XBRL Zipped Folder -- 0001493152-21-009466-xbrl      Zip     80K 


‘EX-101.LAB’   —   XBRL Labels — sglb-20210331_lab


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
<?xml version="1.0" standalone="no" encoding="windows-1252"?>
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<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" roleURI="http://www.xbrl.org/2009/role/negatedLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" roleURI="http://www.xbrl.org/2009/role/negatedNetLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
<link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" roleURI="http://www.xbrl.org/2009/role/netLabel"/>
<link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xml:lang="en-US"> Antidilutive Securities [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantMember" xlink:to="us-gaap_WarrantMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantMember_lbl" xml:lang="en-US"> Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockOptionMember" xlink:label="us-gaap_StockOptionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionMember" xlink:to="us-gaap_StockOptionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionMember_lbl" xml:lang="en-US"> Stock Options [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US"> Equity Components [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US"> Common Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US"> Additional Paid-in Capital [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US"> Accumulated Deficit [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xml:lang="en-US"> Sale of Stock [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrivatePlacementMember_lbl" xml:lang="en-US"> Private Placement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="srt_TitleOfIndividualAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_TitleOfIndividualAxis" xlink:to="srt_TitleOfIndividualAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_TitleOfIndividualAxis_lbl" xml:lang="en-US"> Title of Individual [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DirectorsMember" xlink:label="SGLB_DirectorsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DirectorsMember" xlink:to="SGLB_DirectorsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DirectorsMember_lbl" xml:lang="en-US"> Directors [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US"> Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xml:lang="en-US"> Type of Arrangement and Non-arrangement Transactions [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuritiesPurchaseAgreementMember" xlink:label="SGLB_SecuritiesPurchaseAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesPurchaseAgreementMember" xlink:to="SGLB_SecuritiesPurchaseAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SecuritiesPurchaseAgreementMember_lbl" xml:lang="en-US"> Securities Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xml:lang="en-US"> Class of Stock [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeriesDPreferredStockMember" xlink:label="us-gaap_SeriesDPreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesDPreferredStockMember" xlink:to="us-gaap_SeriesDPreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl" xml:lang="en-US"> Series D Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PreferredStockWarrantsMember" xlink:label="SGLB_PreferredStockWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PreferredStockWarrantsMember" xlink:to="SGLB_PreferredStockWarrantsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_PreferredStockWarrantsMember_lbl" xml:lang="en-US"> Preferred Stock Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SeriesDConvertiblePreferredStockMember" xlink:label="SGLB_SeriesDConvertiblePreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesDConvertiblePreferredStockMember" xlink:to="SGLB_SeriesDConvertiblePreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SeriesDConvertiblePreferredStockMember_lbl" xml:lang="en-US"> Series D Convertible Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardDateAxis" xlink:label="us-gaap_AwardDateAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardDateAxis_lbl" xml:lang="en-US"> Award Date [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember" xlink:to="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember_lbl" xml:lang="en-US"> December 31, 2021 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember" xlink:to="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember_lbl" xml:lang="en-US"> December 31, 2022 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SeriesEConvertiblePreferredStockMember" xlink:label="SGLB_SeriesEConvertiblePreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesEConvertiblePreferredStockMember" xlink:to="SGLB_SeriesEConvertiblePreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SeriesEConvertiblePreferredStockMember_lbl" xml:lang="en-US"> Series E Convertible Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PlanNameAxis_lbl" xml:lang="en-US"> Plan Name [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember" xlink:label="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember" xlink:to="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember_lbl" xml:lang="en-US"> 2020 Stock Appreciation Rights Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US"> Award Type [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockAppreciationRightsMember" xlink:label="SGLB_StockAppreciationRightsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRightsMember" xlink:to="SGLB_StockAppreciationRightsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockAppreciationRightsMember_lbl" xml:lang="en-US"> Stock Appreciation Rights [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_RangeAxis_lbl" xml:lang="en-US"> Range [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MaximumMember_lbl" xml:lang="en-US"> Maximum [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US"> Fair Value Hierarchy and NAV [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xml:lang="en-US"> Fair Value, Inputs, Level 3 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xml:lang="en-US"> Measurement Input Type [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:to="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xml:lang="en-US"> Risk-Free Interest Rate [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputPriceVolatilityMember" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputPriceVolatilityMember" xlink:to="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xml:lang="en-US"> Expected Volatility [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MinimumMember_lbl" xml:lang="en-US"> Minimum [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputExpectedDividendRateMember" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:to="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xml:lang="en-US"> Dividend Yield [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:label="us-gaap_MeasurementInputExpectedTermMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedTermMember" xlink:to="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xml:lang="en-US"> Expected Life (in Years) [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_AprilTwentyThousandAndTwentyOfferingMember" xlink:label="SGLB_AprilTwentyThousandAndTwentyOfferingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AprilTwentyThousandAndTwentyOfferingMember" xlink:to="SGLB_AprilTwentyThousandAndTwentyOfferingMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_AprilTwentyThousandAndTwentyOfferingMember_lbl" xml:lang="en-US"> April 2020 Offering [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PublicOfferingMember" xlink:label="SGLB_PublicOfferingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PublicOfferingMember" xlink:to="SGLB_PublicOfferingMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_PublicOfferingMember_lbl" xml:lang="en-US"> Public Offering [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PurchaseAgreementMember" xlink:label="SGLB_PurchaseAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PurchaseAgreementMember" xlink:to="SGLB_PurchaseAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_PurchaseAgreementMember_lbl" xml:lang="en-US"> Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PlacementAgentWarrantsMember" xlink:label="SGLB_PlacementAgentWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PlacementAgentWarrantsMember" xlink:to="SGLB_PlacementAgentWarrantsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_PlacementAgentWarrantsMember_lbl" xml:lang="en-US"> Placement Agent Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputSharePriceMember" xlink:label="us-gaap_MeasurementInputSharePriceMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputSharePriceMember" xlink:to="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xml:lang="en-US"> Measurement Input, Share Price [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US"> Related Party [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CorProminenceMember" xlink:label="SGLB_CorProminenceMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CorProminenceMember" xlink:to="SGLB_CorProminenceMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_CorProminenceMember_lbl" xml:lang="en-US"> CorProminence [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_TwoThousandandThirteenStockOptionPlanMember" xlink:label="SGLB_TwoThousandandThirteenStockOptionPlanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoThousandandThirteenStockOptionPlanMember" xlink:to="SGLB_TwoThousandandThirteenStockOptionPlanMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_TwoThousandandThirteenStockOptionPlanMember_lbl" xml:lang="en-US"> 2013 Stock Option Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ConsultantMember" xlink:label="SGLB_ConsultantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ConsultantMember" xlink:to="SGLB_ConsultantMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ConsultantMember_lbl" xml:lang="en-US"> Consultant [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US"> Legal Entity [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_IronDomeVenturesLLCMember" xlink:label="SGLB_IronDomeVenturesLLCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IronDomeVenturesLLCMember" xlink:to="SGLB_IronDomeVenturesLLCMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_IronDomeVenturesLLCMember_lbl" xml:lang="en-US"> Iron Dome Ventures, LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestorMember" xlink:label="us-gaap_InvestorMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestorMember" xlink:to="us-gaap_InvestorMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestorMember_lbl" xml:lang="en-US"> Investor [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockOptionsMember" xlink:label="SGLB_StockOptionsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockOptionsMember" xlink:to="SGLB_StockOptionsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="SGLB_StockOptionsMember_lbl" xml:lang="en-US"> Stock Options [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_FiveEmployeesMember" xlink:label="SGLB_FiveEmployeesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_FiveEmployeesMember" xlink:to="SGLB_FiveEmployeesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_FiveEmployeesMember_lbl" xml:lang="en-US"> Five Employees [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CoverAbstract_lbl" xml:lang="en-US"> Cover [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US"> Entity Registrant Name </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US"> Entity Central Index Key </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US"> Document Type </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US"> Document Period End Date </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US"> Amendment Flag </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US"> Current Fiscal Year End Date </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCurrentReportingStatus_lbl" xml:lang="en-US"> Entity Current Reporting Status </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityInteractiveDataCurrent" xlink:to="dei_EntityInteractiveDataCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xml:lang="en-US"> Entity Interactive Data Current </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US"> Entity Filer Category </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntitySmallBusiness_lbl" xml:lang="en-US"> Entity Small Business Flag </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xml:lang="en-US"> Entity Emerging Growth Company </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityShellCompany_lbl" xml:lang="en-US"> Entity Shell Company </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xml:lang="en-US"> Entity Common Stock, Shares Outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US"> Document Fiscal Period Focus </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US"> Document Fiscal Year Focus </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US"> Statement of Financial Position [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US"> ASSETS </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US"> Current Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNetCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xml:lang="en-US"> Accounts Receivable, net </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US"> Inventory </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrent" xlink:to="us-gaap_PrepaidExpenseCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xml:lang="en-US"> Prepaid Assets </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US"> Total Current Assets </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_AssetsNoncurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xml:lang="en-US"> Other Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US"> Property and Equipment, net </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xml:lang="en-US"> Intangible Assets, net </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseNoncurrent" xlink:label="us-gaap_PrepaidExpenseNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseNoncurrent" xlink:to="us-gaap_PrepaidExpenseNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseNoncurrent_lbl" xml:lang="en-US"> Long-Term Prepaid Asset </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US"> Total Other Assets </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US"> TOTAL ASSETS </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US"> LIABILITIES AND STOCKHOLDERS' EQUITY </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US"> Current Liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xml:lang="en-US"> Accounts Payable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="us-gaap_DeferredRevenueCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueCurrent" xlink:to="us-gaap_DeferredRevenueCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US"> Deferred Revenue </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Accrued Expenses </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="us-gaap_DerivativeLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesCurrent" xlink:to="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xml:lang="en-US"> Derivative Liability </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US"> Total Current Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xml:lang="en-US"> Long-Term Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockAppreciationRights" xlink:label="SGLB_StockAppreciationRights"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRights" xlink:to="SGLB_StockAppreciationRights_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockAppreciationRights_lbl" xml:lang="en-US"> Stock Appreciation Rights </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:to="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl" xml:lang="en-US"> CARES Act Deferred Payroll Taxes </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="us-gaap_LiabilitiesNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrent" xlink:to="us-gaap_LiabilitiesNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xml:lang="en-US"> Total Long-Term Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US"> TOTAL LIABILITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US"> Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US"> Preferred Stock, $0.001 par; 10,000,000 shares authorized; 465 and 715 issued and outstanding, respectively </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US"> Common Stock, $0.001 par; 12,000,000 shares authorized; 10,493,598 and 5,995,320 issued and outstanding, respectively </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US"> Additional Paid-In Capital </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US"> Accumulated Deficit </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US"> Total Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US"> TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Preferred stock, par value </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US"> Preferred stock, shares authorized </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US"> Preferred stock, shares issued </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US"> Preferred stock, shares outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Common stock, par value </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US"> Common stock, shares authorized </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US"> Common stock, shares issued </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US"> Common stock, shares outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US"> Income Statement [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xml:lang="en-US"> REVENUES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US"> COST OF REVENUE </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GrossProfit_lbl" xml:lang="en-US"> GROSS PROFIT </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="us-gaap_OperatingExpensesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US"> OPERATING EXPENSES: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="us-gaap_LaborAndRelatedExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LaborAndRelatedExpense" xlink:to="us-gaap_LaborAndRelatedExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xml:lang="en-US"> Salaries & Benefits </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US"> Stock-Based Compensation </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xml:lang="en-US"> Operating R&D Costs </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_InvestorAndPublicRelations" xlink:label="SGLB_InvestorAndPublicRelations"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_InvestorAndPublicRelations" xlink:to="SGLB_InvestorAndPublicRelations_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_InvestorAndPublicRelations_lbl" xml:lang="en-US"> Investor & Public Relations </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_OrganizationalCosts" xlink:label="SGLB_OrganizationalCosts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OrganizationalCosts" xlink:to="SGLB_OrganizationalCosts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_OrganizationalCosts_lbl" xml:lang="en-US"> Organization Costs </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LegalFees" xlink:label="us-gaap_LegalFees"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LegalFees" xlink:to="us-gaap_LegalFees_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LegalFees_lbl" xml:lang="en-US"> Legal & Professional Service Fees </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> Office Expenses </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US"> Depreciation & Amortization </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherExpenses" xlink:label="us-gaap_OtherExpenses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherExpenses" xlink:to="us-gaap_OtherExpenses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherExpenses_lbl" xml:lang="en-US"> Other Operating Expenses </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_OperatingExpenses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingExpenses_lbl" xml:lang="en-US"> Total Operating Expenses </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US"> LOSS FROM OPERATIONS </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US"> OTHER INCOME (EXPENSE) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US"> Interest Income </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeGainOnDerivative" xlink:label="us-gaap_DerivativeGainOnDerivative"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainOnDerivative" xlink:to="us-gaap_DerivativeGainOnDerivative_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeGainOnDerivative_lbl" xml:lang="en-US"> Gain on Derivative Liability </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_GainLossOnExchangeRate" xlink:label="SGLB_GainLossOnExchangeRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_GainLossOnExchangeRate" xlink:to="SGLB_GainLossOnExchangeRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_GainLossOnExchangeRate_lbl" xml:lang="en-US"> Exchange Rate Loss </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US"> Interest Expense </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US"> Total Other Income (Expense) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xml:lang="en-US"> LOSS BEFORE PROVISION FOR INCOME TAXES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US"> Provision for Income Taxes </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US"> Net Loss </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:label="us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:to="us-gaap_PreferredStockDividendsIncomeStatementImpact_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PreferredStockDividendsIncomeStatementImpact_lbl" xml:lang="en-US"> Preferred Dividends </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US"> Net Loss Applicable to Common Stockholders </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US"> Net Loss per Common Share - Basic and Diluted </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xml:lang="en-US"> Weighted Average Number of Shares Outstanding - Basic and Diluted </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US"> Statement [Table] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquity_2_lbl" xml:lang="en-US"> Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharesOutstanding_lbl" xml:lang="en-US"> Balance, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US"> Common Shares Sold in Public and Private Offerings </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xml:lang="en-US"> Common Shares Sold in Public and Private Offerings, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DerivativeLiabilityValueOnIssuanceDate" xlink:label="SGLB_DerivativeLiabilityValueOnIssuanceDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DerivativeLiabilityValueOnIssuanceDate" xlink:to="SGLB_DerivativeLiabilityValueOnIssuanceDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DerivativeLiabilityValueOnIssuanceDate_lbl" xml:lang="en-US"> Derivative Liability Value on Issuance date </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CommonSharesIssuedForExerciseOfWarrants" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForExerciseOfWarrants" xlink:to="SGLB_CommonSharesIssuedForExerciseOfWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrants_lbl" xml:lang="en-US"> Common Shares issued for Exercise of Warrants </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CommonSharesIssuedForExerciseOfWarrantsShares" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares" xlink:to="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares_lbl" xml:lang="en-US"> Common Shares issued for Exercise of Warrants, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPreferredStockStock" xlink:label="us-gaap_DividendsPreferredStockStock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStockStock" xlink:to="us-gaap_DividendsPreferredStockStock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPreferredStockStock_lbl" xml:lang="en-US"> Preferred Stock Dividends </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockDividendsShares" xlink:label="us-gaap_PreferredStockDividendsShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsShares" xlink:to="us-gaap_PreferredStockDividendsShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsShares_lbl" xml:lang="en-US"> Preferred Stock Dividends, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConversionOfStockAmountConverted1" xlink:label="us-gaap_ConversionOfStockAmountConverted1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockAmountConverted1" xlink:to="us-gaap_ConversionOfStockAmountConverted1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockAmountConverted1_lbl" xml:lang="en-US"> Common Shares Issued for Conversion of Preferred Shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConversionOfStockSharesConverted1" xlink:label="us-gaap_ConversionOfStockSharesConverted1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockSharesConverted1" xlink:to="us-gaap_ConversionOfStockSharesConverted1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl" xml:lang="en-US"> Common Shares Issued for Conversion of Preferred Shares,shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CommonSharesIssuedForThirdPartyServices" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForThirdPartyServices" xlink:to="SGLB_CommonSharesIssuedForThirdPartyServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServices_lbl" xml:lang="en-US"> Common Shares Issued for Third Party Services </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CommonSharesIssuedForThirdPartyServicesShares" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServicesShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForThirdPartyServicesShares" xlink:to="SGLB_CommonSharesIssuedForThirdPartyServicesShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServicesShares_lbl" xml:lang="en-US"> Common Shares Issued for Third Party Services, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl" xml:lang="en-US"> Stock Options Issued to Directors for Services </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xml:lang="en-US"> Stock Options Issued to Directors for Services, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuritiesAwardedToEmployees" xlink:label="SGLB_SecuritiesAwardedToEmployees"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesAwardedToEmployees" xlink:to="SGLB_SecuritiesAwardedToEmployees_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SecuritiesAwardedToEmployees_lbl" xml:lang="en-US"> Securities Awarded to Employees </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuritiesAwardedToEmployeesShares" xlink:label="SGLB_SecuritiesAwardedToEmployeesShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesAwardedToEmployeesShares" xlink:to="SGLB_SecuritiesAwardedToEmployeesShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SecuritiesAwardedToEmployeesShares_lbl" xml:lang="en-US"> Securities Awarded to Employees, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts" xlink:label="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts" xlink:to="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts_lbl" xml:lang="en-US"> Offering Costs </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueOther" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueOther" xlink:to="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xml:lang="en-US"> Preferred Shares Sold in Private Offering </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesOther" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesOther" xlink:to="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xml:lang="en-US"> Preferred Shares Sold in Private Offering, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants" xlink:to="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants_lbl" xml:lang="en-US"> Preferred Shares issued for Exercise of Preferred Warrants </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares" xlink:to="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares_lbl" xml:lang="en-US"> Preferred Shares issued for Exercise of Preferred Warrants, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuritiesIssuedForThirdPartyServices" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesIssuedForThirdPartyServices" xlink:to="SGLB_SecuritiesIssuedForThirdPartyServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServices_lbl" xml:lang="en-US"> Securities Issued for Third Party Services </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuritiesIssuedForThirdPartyServicesShares" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServicesShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesIssuedForThirdPartyServicesShares" xlink:to="SGLB_SecuritiesIssuedForThirdPartyServicesShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServicesShares_lbl" xml:lang="en-US"> Securities Issued for Third Party Services, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" xlink:to="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl" xml:lang="en-US"> Stock Options Awarded to Employees </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" xlink:to="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl" xml:lang="en-US"> Stock Options Awarded to Employees, shares </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockIssuedDuringPeriodValueReverseStockSplits" xlink:label="SGLB_StockIssuedDuringPeriodValueReverseStockSplits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueReverseStockSplits" xlink:to="SGLB_StockIssuedDuringPeriodValueReverseStockSplits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockIssuedDuringPeriodValueReverseStockSplits_lbl" xml:lang="en-US"> Issuance of Fractional Shares from Reverse Split </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits" xlink:label="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits" xlink:to="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits_lbl" xml:lang="en-US"> Issuance of Fractional Shares from Reverse Split, shares </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_2_lbl" xml:lang="en-US"> Net Loss </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquity_3_lbl" xml:lang="en-US"> Balance </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharesOutstanding_2_lbl" xml:lang="en-US"> Balance, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US"> Statement of Cash Flows [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> OPERATING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Adjustments to reconcile Net Loss to Net Cash used in operating activities: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Noncash Expenses: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortization_2_lbl" xml:lang="en-US"> Depreciation and Amortization </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainOnDerivative" xlink:to="us-gaap_DerivativeGainOnDerivative_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DerivativeGainOnDerivative_2_lbl" xml:lang="en-US"> Gain on Derivative Liability </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensation_2_lbl" xml:lang="en-US"> Stock Based Compensation Employees </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:label="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:to="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_lbl" xml:lang="en-US"> Stock Based Compensation - Third Party Services </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockBasedCompensationDirectors" xlink:label="SGLB_StockBasedCompensationDirectors"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockBasedCompensationDirectors" xlink:to="SGLB_StockBasedCompensationDirectors_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockBasedCompensationDirectors_lbl" xml:lang="en-US"> Stock Based Compensation - Directors </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US"> Change in assets and liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US"> Accounts Receivable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xml:lang="en-US"> Inventory </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xml:lang="en-US"> Prepaid Assets </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayableTrade" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableTrade_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade_lbl" xml:lang="en-US"> Accounts Payable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xml:lang="en-US"> Deferred Revenue </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US"> Accrued Expenses </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights" xlink:label="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights" xlink:to="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights_lbl" xml:lang="en-US"> Long-term portion of Stock Appreciation Rights </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US"> NET CASH USED IN OPERATING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US"> INVESTING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US"> Purchase of Property and Equipment </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireIntangibleAssets" xlink:to="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xml:lang="en-US"> Purchase of Intangible Assets </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US"> NET CASH USED IN INVESTING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US"> FINANCING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants" xlink:label="us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants" xlink:to="us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants_lbl" xml:lang="en-US"> Gross Proceeds from Public and Private Issuances of Securities </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfInitialPublicOffering" xlink:label="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering" xlink:to="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_lbl" xml:lang="en-US"> Less Offering Costs </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="us-gaap_RepaymentsOfNotesPayable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfNotesPayable" xlink:to="us-gaap_RepaymentsOfNotesPayable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfNotesPayable_lbl" xml:lang="en-US"> Payment of Note Payable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromWarrantExercises" xlink:label="us-gaap_ProceedsFromWarrantExercises"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromWarrantExercises" xlink:to="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xml:lang="en-US"> Proceeds from Exercise of Warrants </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US"> NET CASH PROVIDED BY FINANCING ACTIVITIES </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xml:lang="en-US"> NET CHANGE IN CASH FOR PERIOD </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xml:lang="en-US"> CASH AT BEGINNING OF PERIOD </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_2_lbl" xml:lang="en-US"> CASH AT END OF PERIOD </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US"> Supplemental Disclosures: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xml:lang="en-US"> Noncash investing and financing activities disclosure: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssued1" xlink:label="us-gaap_StockIssued1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssued1" xlink:to="us-gaap_StockIssued1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssued1_lbl" xml:lang="en-US"> Issuance of Common Shares for Preferred Dividends </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract" xlink:label="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract" xlink:to="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract_lbl" xml:lang="en-US"> Other noncash operating activities disclosure: </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_IssuanceOfSecuritiesForServices" xlink:label="SGLB_IssuanceOfSecuritiesForServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IssuanceOfSecuritiesForServices" xlink:to="SGLB_IssuanceOfSecuritiesForServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_IssuanceOfSecuritiesForServices_lbl" xml:lang="en-US"> Issuance of Securities for Services </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DisclosureOfCashPaidAbstract" xlink:label="SGLB_DisclosureOfCashPaidAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DisclosureOfCashPaidAbstract" xlink:to="SGLB_DisclosureOfCashPaidAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DisclosureOfCashPaidAbstract_lbl" xml:lang="en-US"> Disclosure of cash paid for: </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US"> Interest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="us-gaap_IncomeTaxesPaid"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaid" xlink:to="us-gaap_IncomeTaxesPaid_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xml:lang="en-US"> Income Taxes </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_AccountingPoliciesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xml:lang="en-US"> Accounting Policies [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US"> Summary of Significant Accounting Policies </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xml:lang="en-US"> Inventory Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="us-gaap_InventoryDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureTextBlock" xlink:to="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xml:lang="en-US"> Inventory </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DeferralOfSocialSecurityTaxPaymentsAbstract" xlink:label="SGLB_DeferralOfSocialSecurityTaxPaymentsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralOfSocialSecurityTaxPaymentsAbstract" xlink:to="SGLB_DeferralOfSocialSecurityTaxPaymentsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DeferralOfSocialSecurityTaxPaymentsAbstract_lbl" xml:lang="en-US"> Deferral Of Social Security Tax Payments </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock" xlink:label="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock" xlink:to="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock_lbl" xml:lang="en-US"> Deferral of Social Security Tax Payments </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xml:lang="en-US"> Derivative Instruments and Hedging Activities Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xml:lang="en-US"> Derivative Liability </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityAbstract_lbl" xml:lang="en-US"> Equity [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US"> Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xml:lang="en-US"> Subsequent Events [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US"> Subsequent Events </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_NatureOfBusinessPolicyTextBlock" xlink:label="SGLB_NatureOfBusinessPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_NatureOfBusinessPolicyTextBlock" xlink:to="SGLB_NatureOfBusinessPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_NatureOfBusinessPolicyTextBlock_lbl" xml:lang="en-US"> Nature of Business </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xml:lang="en-US"> Basis of Presentation </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xml:lang="en-US"> Reclassification </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:to="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xml:lang="en-US"> Fair Value of Financial Instruments </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US"> Loss Per Share </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UseOfEstimates_lbl" xml:lang="en-US"> Accounting Estimates </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xml:lang="en-US"> Schedule of Warrant Liability Measured on Recurring Basis </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xml:lang="en-US"> Schedule of Derivative Liability Measured on a Recurring Basis Using Significant Unobservable Input (Level 3) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xml:lang="en-US"> Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:to="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xml:lang="en-US"> Schedule of Earnings Per Share, Basic and Diluted </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:to="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xml:lang="en-US"> Schedule of Inventory </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xml:lang="en-US"> Schedule of Fair Value of Derivative Liability Using Black Scholes Valuation Model </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:label="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:to="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_lbl" xml:lang="en-US"> Schedule of Fair Value of Warrant Liability </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xml:lang="en-US"> Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US"> Schedule of Stock Option Activity </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:to="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xml:lang="en-US"> Summary of Warrant Activity </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="srt_RangeAxis_2_lbl" xml:lang="en-US"> Statistical Measurement [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xml:lang="en-US"> Aggregate warrant purchase of shares </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_2_lbl" xml:lang="en-US"> Common shares authorized </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesCurrent" xlink:to="us-gaap_DerivativeLiabilitiesCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_2_lbl" xml:lang="en-US"> Derivative liability - Warrants </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesCurrent" xlink:to="us-gaap_DerivativeLiabilitiesCurrent_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_3_lbl" xml:lang="en-US"> Fair Value on Issuance Date </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xml:lang="en-US"> Change in fair value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesCurrent" xlink:to="us-gaap_DerivativeLiabilitiesCurrent_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_4_lbl" xml:lang="en-US"> Fair value on March 31, 2021 </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US"> Antidilutive securities excluded from computation of earnings per share, amount </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic" xlink:label="us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic" xlink:to="us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_lbl" xml:lang="en-US"> Loss from continuing operations available to common stockholders (numerator) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_2_lbl" xml:lang="en-US"> Weighted average number of common shares Outstanding used in loss per share during the Period (denominator) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryRawMaterialsAndSupplies" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterialsAndSupplies" xlink:to="us-gaap_InventoryRawMaterialsAndSupplies_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies_lbl" xml:lang="en-US"> Raw Materials </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="us-gaap_InventoryWorkInProcess"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcess" xlink:to="us-gaap_InventoryWorkInProcess_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xml:lang="en-US"> Work in Process </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoods" xlink:to="us-gaap_InventoryFinishedGoods_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xml:lang="en-US"> Finished Goods </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InventoryNet_2_lbl" xml:lang="en-US"> Total Inventory </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DeferralPaymentsDescription" xlink:label="SGLB_DeferralPaymentsDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralPaymentsDescription" xlink:to="SGLB_DeferralPaymentsDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DeferralPaymentsDescription_lbl" xml:lang="en-US"> Deferral payments description </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DeferralAmount" xlink:label="SGLB_DeferralAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralAmount" xlink:to="SGLB_DeferralAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DeferralAmount_lbl" xml:lang="en-US"> Deferral amount </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DeferralProgramPercentage" xlink:label="SGLB_DeferralProgramPercentage"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralProgramPercentage" xlink:to="SGLB_DeferralProgramPercentage_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DeferralProgramPercentage_lbl" xml:lang="en-US"> Deferral program percentage </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_2_lbl" xml:lang="en-US"> Warrants to purchase shares of common stock </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_2_lbl" xml:lang="en-US"> Number of common shares issued </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:label="us-gaap_SharesIssuedPricePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xml:lang="en-US"> Share price per share </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainOnDerivative" xlink:to="us-gaap_DerivativeGainOnDerivative_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeGainOnDerivative_3_lbl" xml:lang="en-US"> Gain on change in fair value of warrants </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilityMeasurementInput" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilityMeasurementInput" xlink:to="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xml:lang="en-US"> Derivative liability, measurement input </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DerivativeLiabilityExpectedTermConversionFeature" xlink:label="SGLB_DerivativeLiabilityExpectedTermConversionFeature"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DerivativeLiabilityExpectedTermConversionFeature" xlink:to="SGLB_DerivativeLiabilityExpectedTermConversionFeature_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DerivativeLiabilityExpectedTermConversionFeature_lbl" xml:lang="en-US"> Derivative liability, Expected life (in years) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xml:lang="en-US"> Warrants Outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ClassOfWarrantOrRightFairValuePerShare" xlink:label="SGLB_ClassOfWarrantOrRightFairValuePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ClassOfWarrantOrRightFairValuePerShare" xlink:to="SGLB_ClassOfWarrantOrRightFairValuePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ClassOfWarrantOrRightFairValuePerShare_lbl" xml:lang="en-US"> Fair Value per Share </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstanding" xlink:label="us-gaap_WarrantsAndRightsOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xml:lang="en-US"> Fair Value beginning balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAdjustmentOfWarrants" xlink:label="us-gaap_FairValueAdjustmentOfWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xml:lang="en-US"> (Gain) on change in Fair Value of warrant liability </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="us-gaap_WarrantsAndRightsOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_WarrantsAndRightsOutstanding_2_lbl" xml:lang="en-US"> Fair Value ending balance </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_TypeOfArrangementAxis_2_lbl" xml:lang="en-US"> Collaborative Arrangement and Arrangement Other than Collaborative [Axis] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="dei_LegalEntityAxis_2_lbl" xml:lang="en-US"> Series [Axis] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_3_lbl" xml:lang="en-US"> Common stock issued during period </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:to="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xml:lang="en-US"> Proceeds from public offering </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingTerm" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xml:lang="en-US"> Warrant term </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xml:lang="en-US"> Warrants exercise price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockSharesConverted1" xlink:to="us-gaap_ConversionOfStockSharesConverted1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConversionOfStockSharesConverted1_2_lbl" xml:lang="en-US"> Conversion of stock, shares converted </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_NumberOfSharesAsInkindPaymentShares" xlink:label="SGLB_NumberOfSharesAsInkindPaymentShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_NumberOfSharesAsInkindPaymentShares" xlink:to="SGLB_NumberOfSharesAsInkindPaymentShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_NumberOfSharesAsInkindPaymentShares_lbl" xml:lang="en-US"> Number of shares as in-kind payment, shares </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_lbl" xml:lang="en-US"> Common stock upon the exercise of warrants </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:to="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xml:lang="en-US"> Percentage of warrant exercise price </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xml:lang="en-US"> Sale of stock </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DividendsPercentage" xlink:label="SGLB_DividendsPercentage"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DividendsPercentage" xlink:to="SGLB_DividendsPercentage_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_DividendsPercentage_lbl" xml:lang="en-US"> Dividends percentage </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xml:lang="en-US"> Conversion price per share </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConversionOfStockDescription" xlink:label="us-gaap_ConversionOfStockDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockDescription" xlink:to="us-gaap_ConversionOfStockDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockDescription_lbl" xml:lang="en-US"> Conversion description </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xml:lang="en-US"> Common stock shares reserved for issuance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xml:lang="en-US"> Number of shares granted </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_2_lbl" xml:lang="en-US"> Shares issued for services </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_OptionStrikePrice" xlink:label="SGLB_OptionStrikePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OptionStrikePrice" xlink:to="SGLB_OptionStrikePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_OptionStrikePrice_lbl" xml:lang="en-US"> Option strike price </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xml:lang="en-US"> Vesting period </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" xml:lang="en-US"> Vesting date </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensation_3_lbl" xml:lang="en-US"> Share based compensation </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US"> Options exercise price </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US"> Number of options exercised </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xml:lang="en-US"> Unrecognized share based compensation </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US"> Option term </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_StockAppreciationRightsGrantedDescription" xlink:label="SGLB_StockAppreciationRightsGrantedDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRightsGrantedDescription" xlink:to="SGLB_StockAppreciationRightsGrantedDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockAppreciationRightsGrantedDescription_lbl" xml:lang="en-US"> Stock appreciation rights granted description </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xml:lang="en-US"> Dividend yield </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xml:lang="en-US"> Risk-free interest rate, minimum </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xml:lang="en-US"> Risk-free interest rate, maximum </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xml:lang="en-US"> Expected volatility, minimum </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xml:lang="en-US"> Expected volatility, maximum </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xml:lang="en-US"> Expected life (in years) </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xml:lang="en-US"> Number of Options, Outstanding, Beginning Balance </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_2_lbl" xml:lang="en-US"> Number of Options, Granted </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2_lbl" xml:lang="en-US"> Number of Options, Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xml:lang="en-US"> Number of Options, Forfeited or cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2_lbl" xml:lang="en-US"> Number of Options, Outstanding Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xml:lang="en-US"> Number of Options, Expected to vest in the future Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xml:lang="en-US"> Number of Options, Exercisable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_lbl" xml:lang="en-US"> Number of Options, Vested, Exercisable and Options Expected to Vest Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Outstanding Beginning Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Granted </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Forfeited or cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Expected to Vest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Exercisable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Vested, Exercisable and Options Expected to Vest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Outstanding Beginning </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Granted </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm" xlink:label="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Forfeited or cancelled </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Expected to Vest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Exercisable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life, Vested, Exercisable and Options Expected to Vest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Outstanding Beginning Balance </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Granted </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Forfeited or cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_2_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Outstanding Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Options expected to vest in the future </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Options exercisable </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl" xml:lang="en-US"> Aggregate Intrinsic Value, Options vested, exercisable and options expected to vest </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xml:lang="en-US"> Number of Shares, Warrants Outstanding, Beginning balance </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xml:lang="en-US"> Number of Shares, Warrants Granted </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_2_lbl" xml:lang="en-US"> Number of Shares, Warrants Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xml:lang="en-US"> Number of Shares, Warrants Forfeited or Cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_2_lbl" xml:lang="en-US"> Number of Shares, Warrants Outstanding, Ending balance </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Warrants outstanding, Beginning balance </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Warrants Granted </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Warrants Exercised </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Warrants Forfeited or cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Weighted Average Exercise Price, Warrants outstanding, Ending balance </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Beginning balance </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life (Years), Warrants Granted </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life (Years), Warrants outstanding, Ending balance </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts" xlink:to="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_AdjustmentsToAdditionalPaidInCapitalOfferingCosts_doc" xml:lang="en-US"> Adjustments to additional paid in capital, offering costs. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_AnnualShareholdersMember" xlink:label="SGLB_AnnualShareholdersMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AnnualShareholdersMember" xlink:to="SGLB_AnnualShareholdersMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_AnnualShareholdersMember_doc" xml:lang="en-US"> Annual Shareholders [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AprilTwentyThousandAndTwentyOfferingMember" xlink:to="SGLB_AprilTwentyThousandAndTwentyOfferingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_AprilTwentyThousandAndTwentyOfferingMember_doc" xml:lang="en-US"> April 2020 Offering [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_AugustTwoThousandNineteenPublicOfferingMember" xlink:label="SGLB_AugustTwoThousandNineteenPublicOfferingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_AugustTwoThousandNineteenPublicOfferingMember" xlink:to="SGLB_AugustTwoThousandNineteenPublicOfferingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_AugustTwoThousandNineteenPublicOfferingMember_doc" xml:lang="en-US"> August 2019 Public Offering [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForExerciseOfWarrants" xlink:to="SGLB_CommonSharesIssuedForExerciseOfWarrants_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrants_doc" xml:lang="en-US"> Common Shares issued for Exercise of Warrants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares" xlink:to="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CommonSharesIssuedForExerciseOfWarrantsShares_doc" xml:lang="en-US"> Common Shares issued for Exercise of Warrants, shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForThirdPartyServices" xlink:to="SGLB_CommonSharesIssuedForThirdPartyServices_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServices_doc" xml:lang="en-US"> Common Shares Issued for Third Party Services. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CommonSharesIssuedForThirdPartyServicesShares" xlink:to="SGLB_CommonSharesIssuedForThirdPartyServicesShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CommonSharesIssuedForThirdPartyServicesShares_doc" xml:lang="en-US"> Common Shares Issued for Third Party Services, shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ConsultantMember" xlink:to="SGLB_ConsultantMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ConsultantMember_doc" xml:lang="en-US"> Consultant [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ConvertibleNotePayableMember" xlink:label="SGLB_ConvertibleNotePayableMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ConvertibleNotePayableMember" xlink:to="SGLB_ConvertibleNotePayableMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ConvertibleNotePayableMember_doc" xml:lang="en-US"> Convertible Note Payable [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CorProminenceMember" xlink:to="SGLB_CorProminenceMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CorProminenceMember_doc" xml:lang="en-US"> CorProminence [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerAMember" xlink:label="SGLB_CustomerAMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerAMember" xlink:to="SGLB_CustomerAMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerAMember_doc" xml:lang="en-US"> Customer A [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerBMember" xlink:label="SGLB_CustomerBMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerBMember" xlink:to="SGLB_CustomerBMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerBMember_doc" xml:lang="en-US"> Customer B [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerCMember" xlink:label="SGLB_CustomerCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerCMember" xlink:to="SGLB_CustomerCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerCMember_doc" xml:lang="en-US"> Customer C [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerDMember" xlink:label="SGLB_CustomerDMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerDMember" xlink:to="SGLB_CustomerDMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerDMember_doc" xml:lang="en-US"> Customer D [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerEMember" xlink:label="SGLB_CustomerEMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerEMember" xlink:to="SGLB_CustomerEMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerEMember_doc" xml:lang="en-US"> Customer E [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerFMember" xlink:label="SGLB_CustomerFMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerFMember" xlink:to="SGLB_CustomerFMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerFMember_doc" xml:lang="en-US"> Customer F [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerGMember" xlink:label="SGLB_CustomerGMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerGMember" xlink:to="SGLB_CustomerGMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerGMember_doc" xml:lang="en-US"> Customer G [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_CustomerIMember" xlink:label="SGLB_CustomerIMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_CustomerIMember" xlink:to="SGLB_CustomerIMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_CustomerIMember_doc" xml:lang="en-US"> Customer I [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_DawsonJamesSecuritiesIncMember" xlink:label="SGLB_DawsonJamesSecuritiesIncMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DawsonJamesSecuritiesIncMember" xlink:to="SGLB_DawsonJamesSecuritiesIncMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DawsonJamesSecuritiesIncMember_doc" xml:lang="en-US"> Dawson James Securities, Inc [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember" xlink:to="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyOneMember_doc" xml:lang="en-US"> December 31, 2021 [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember" xlink:to="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DecemberThirtyFirstTwoThousandTwentyTwoMember_doc" xml:lang="en-US"> December 31, 2022 [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralAmount" xlink:to="SGLB_DeferralAmount_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DeferralAmount_doc" xml:lang="en-US"> Deferral amount. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock" xlink:to="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DeferralOfSocialSecurityTaxPaymentsTextBlock_doc" xml:lang="en-US"> Deferral of social security tax payments [Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralPaymentsDescription" xlink:to="SGLB_DeferralPaymentsDescription_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DeferralPaymentsDescription_doc" xml:lang="en-US"> Deferral payments description. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DeferralProgramPercentage" xlink:to="SGLB_DeferralProgramPercentage_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DeferralProgramPercentage_doc" xml:lang="en-US"> Deferral program percentage. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DerivativeLiabilityValueOnIssuanceDate" xlink:to="SGLB_DerivativeLiabilityValueOnIssuanceDate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DerivativeLiabilityValueOnIssuanceDate_doc" xml:lang="en-US"> Derivative Liability Value on Issuance date. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DirectorsMember" xlink:to="SGLB_DirectorsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DirectorsMember_doc" xml:lang="en-US"> Directors [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DisclosureOfCashPaidAbstract" xlink:to="SGLB_DisclosureOfCashPaidAbstract_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DisclosureOfCashPaidAbstract_doc" xml:lang="en-US"> Disclosure of cash paid [Abstract] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DividendsPercentage" xlink:to="SGLB_DividendsPercentage_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DividendsPercentage_doc" xml:lang="en-US"> Dividends percentage. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_EmployeesAndConsultantMember" xlink:label="SGLB_EmployeesAndConsultantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_EmployeesAndConsultantMember" xlink:to="SGLB_EmployeesAndConsultantMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_EmployeesAndConsultantMember_doc" xml:lang="en-US"> Employees and Consultant [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_EmployeesAndConsultantsMember" xlink:label="SGLB_EmployeesAndConsultantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_EmployeesAndConsultantsMember" xlink:to="SGLB_EmployeesAndConsultantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_EmployeesAndConsultantsMember_doc" xml:lang="en-US"> 22 Employees and 2 Consultants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_GainLossOnExchangeRate" xlink:to="SGLB_GainLossOnExchangeRate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_GainLossOnExchangeRate_doc" xml:lang="en-US"> Gain loss on exchange rate. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights" xlink:to="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_IncreaseDecreaseInLongtermPortionOfStockAppreciationRights_doc" xml:lang="en-US"> Long-term portion of Stock Appreciation Rights. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_IntangibleAssetsMember" xlink:label="SGLB_IntangibleAssetsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IntangibleAssetsMember" xlink:to="SGLB_IntangibleAssetsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_IntangibleAssetsMember_doc" xml:lang="en-US"> Intangible Assets [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_InvestorAndPublicRelations" xlink:to="SGLB_InvestorAndPublicRelations_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_InvestorAndPublicRelations_doc" xml:lang="en-US"> Investor & public relations. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_JuneTwoThousandEighteenPublicOfferingMember" xlink:label="SGLB_JuneTwoThousandEighteenPublicOfferingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_JuneTwoThousandEighteenPublicOfferingMember" xlink:to="SGLB_JuneTwoThousandEighteenPublicOfferingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_JuneTwoThousandEighteenPublicOfferingMember_doc" xml:lang="en-US"> June 2018 Public Offering [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_MHZCILLCMember" xlink:label="SGLB_MHZCILLCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_MHZCILLCMember" xlink:to="SGLB_MHZCILLCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_MHZCILLCMember_doc" xml:lang="en-US"> MHZCI, LLC [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_NatureOfBusinessPolicyTextBlock" xlink:to="SGLB_NatureOfBusinessPolicyTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_NatureOfBusinessPolicyTextBlock_doc" xml:lang="en-US"> Nature of business [Policy Text Block] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_NinteenEmployeesFourDirectosAndFiveConsultantMember" xlink:label="SGLB_NinteenEmployeesFourDirectosAndFiveConsultantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_NinteenEmployeesFourDirectosAndFiveConsultantMember" xlink:to="SGLB_NinteenEmployeesFourDirectosAndFiveConsultantMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_NinteenEmployeesFourDirectosAndFiveConsultantMember_doc" xml:lang="en-US"> 19 Employees 4 Directors and 5 Consultant [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_NumberOfSharesAsInkindPaymentShares" xlink:to="SGLB_NumberOfSharesAsInkindPaymentShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_NumberOfSharesAsInkindPaymentShares_doc" xml:lang="en-US"> Number of shares as in-kind payment, shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OrganizationalCosts" xlink:to="SGLB_OrganizationalCosts_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_OrganizationalCosts_doc" xml:lang="en-US"> Organizational costs. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract" xlink:to="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_OtherNoncashOperatingActivitiesDisclosureAbstract_doc" xml:lang="en-US"> Other noncash operating activities disclosure. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PatentMember" xlink:label="SGLB_PatentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PatentMember" xlink:to="SGLB_PatentMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PatentMember_doc" xml:lang="en-US"> Patent [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PaycheckProtectionProgramMember" xlink:label="SGLB_PaycheckProtectionProgramMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PaycheckProtectionProgramMember" xlink:to="SGLB_PaycheckProtectionProgramMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PaycheckProtectionProgramMember_doc" xml:lang="en-US"> Paycheck Protection Program [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PlacementAgentWarrantsMember" xlink:to="SGLB_PlacementAgentWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PlacementAgentWarrantsMember_doc" xml:lang="en-US"> Placement Agent Warrants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PreferredStockWarrantsMember" xlink:to="SGLB_PreferredStockWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PreferredStockWarrantsMember_doc" xml:lang="en-US"> Preferred Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PreferredWarrantsMember" xlink:label="SGLB_PreferredWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PreferredWarrantsMember" xlink:to="SGLB_PreferredWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PreferredWarrantsMember_doc" xml:lang="en-US"> Preferred Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PrefundedWarrantsMember" xlink:label="SGLB_PrefundedWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PrefundedWarrantsMember" xlink:to="SGLB_PrefundedWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PrefundedWarrantsMember_doc" xml:lang="en-US"> Pre-funded Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_PrintRite3DMember" xlink:label="SGLB_PrintRite3DMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PrintRite3DMember" xlink:to="SGLB_PrintRite3DMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PrintRite3DMember_doc" xml:lang="en-US"> PrintRite3D [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_ProvisionalPatentApplicationsMember" xlink:label="SGLB_ProvisionalPatentApplicationsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ProvisionalPatentApplicationsMember" xlink:to="SGLB_ProvisionalPatentApplicationsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ProvisionalPatentApplicationsMember_doc" xml:lang="en-US"> Provisional Patent Applications [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PublicOfferingMember" xlink:to="SGLB_PublicOfferingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PublicOfferingMember_doc" xml:lang="en-US"> Public Offering [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_PurchaseAgreementMember" xlink:to="SGLB_PurchaseAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_PurchaseAgreementMember_doc" xml:lang="en-US"> Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SecuredConvertiblePromissoryNotesMember" xlink:label="SGLB_SecuredConvertiblePromissoryNotesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuredConvertiblePromissoryNotesMember" xlink:to="SGLB_SecuredConvertiblePromissoryNotesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuredConvertiblePromissoryNotesMember_doc" xml:lang="en-US"> Secured Convertible Promissory Notes [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesAwardedToEmployees" xlink:to="SGLB_SecuritiesAwardedToEmployees_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuritiesAwardedToEmployees_doc" xml:lang="en-US"> Securities awarded to employees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesAwardedToEmployeesShares" xlink:to="SGLB_SecuritiesAwardedToEmployeesShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuritiesAwardedToEmployeesShares_doc" xml:lang="en-US"> Securities awarded to employees, shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesIssuedForThirdPartyServices" xlink:to="SGLB_SecuritiesIssuedForThirdPartyServices_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServices_doc" xml:lang="en-US"> Securities issued for third party services. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesIssuedForThirdPartyServicesShares" xlink:to="SGLB_SecuritiesIssuedForThirdPartyServicesShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuritiesIssuedForThirdPartyServicesShares_doc" xml:lang="en-US"> Securities issued for third party services, shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SecuritiesPurchaseAgreementMember" xlink:to="SGLB_SecuritiesPurchaseAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SecuritiesPurchaseAgreementMember_doc" xml:lang="en-US"> Securities Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SeriesAWarrantsMember" xlink:label="SGLB_SeriesAWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesAWarrantsMember" xlink:to="SGLB_SeriesAWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SeriesAWarrantsMember_doc" xml:lang="en-US"> Series A Warrants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesDConvertiblePreferredStockMember" xlink:to="SGLB_SeriesDConvertiblePreferredStockMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SeriesDConvertiblePreferredStockMember_doc" xml:lang="en-US"> Series D Convertible Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SeriesDConvertiblePreferredStockOneMember" xlink:label="SGLB_SeriesDConvertiblePreferredStockOneMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesDConvertiblePreferredStockOneMember" xlink:to="SGLB_SeriesDConvertiblePreferredStockOneMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SeriesDConvertiblePreferredStockOneMember_doc" xml:lang="en-US"> Series D Convertible Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SeriesDPreferredWarrantsMember" xlink:label="SGLB_SeriesDPreferredWarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesDPreferredWarrantsMember" xlink:to="SGLB_SeriesDPreferredWarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SeriesDPreferredWarrantsMember_doc" xml:lang="en-US"> Series D Preferred Warrants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SeriesEConvertiblePreferredStockMember" xlink:to="SGLB_SeriesEConvertiblePreferredStockMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SeriesEConvertiblePreferredStockMember_doc" xml:lang="en-US"> Series E Convertible Preferred Stock [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_doc" xml:lang="en-US"> Weighted average exercise price, warrants outstanding. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageRemainingContractualTerm_doc" xml:lang="en-US"> Share-based compensation arrangement by sharebased payment award, options, exercised, weighted average remaining contractual term. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedorCancelledInPeriodTotalIntrinsicValue_doc" xml:lang="en-US"> Share based compensation arrangement by share based payment award options for feited or cancelled in period total intrinsic value. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodIntrinsicValue_doc" xml:lang="en-US"> Share-based compensation arrangement by share based payment award options granted in period intrinsic value. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_doc" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Granted, Weighted Average Remaining Contractual Term . </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm" xlink:to="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedOrCancelledWeightedAverageRemainingContractualTerm_doc" xml:lang="en-US"> Share based compensation arrangement by share based payment award options forfeited or cancelled weighted average remaining contractual term. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice_doc" xml:lang="en-US"> Weighted Average Exercise Price, Warrants Exercised. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageWeightedAverageExercisePriceWarrantsForfeitedOrCancelled_doc" xml:lang="en-US"> Weighted Average Exercise Price, Warrants Forfeited or cancelled. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsGrantsInPeriodWeightedAverageExercisePrice_doc" xml:lang="en-US"> Weighted average exercise price, warrants grants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonGrantsWeightedAverageRemainingContractualTerm_doc" xml:lang="en-US"> Weighted average remaining contractual life (years), warrants outstanding grants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm_doc" xml:lang="en-US"> Weighted average remaining contractual life (years), warrants outstanding, beginning balance. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonOutstandingWeightedAverageRemainingContractualTerm1_doc" xml:lang="en-US"> Weighted average remaining contractual life (years), warrants outstanding, ending balance. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_doc" xml:lang="en-US"> Sharebased compensation arrangement by share based Payment award options outstanding weighted average remaining contractual term1 </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_SpecialShareholdersMember" xlink:label="SGLB_SpecialShareholdersMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_SpecialShareholdersMember" xlink:to="SGLB_SpecialShareholdersMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_SpecialShareholdersMember_doc" xml:lang="en-US"> Special Shareholders [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRights" xlink:to="SGLB_StockAppreciationRights_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockAppreciationRights_doc" xml:lang="en-US"> Stock appreciation rights. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRightsGrantedDescription" xlink:to="SGLB_StockAppreciationRightsGrantedDescription_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockAppreciationRightsGrantedDescription_doc" xml:lang="en-US"> Stock appreciation rights granted description. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockAppreciationRightsMember" xlink:to="SGLB_StockAppreciationRightsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockAppreciationRightsMember_doc" xml:lang="en-US"> Stock Appreciation Rights [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockBasedCompensationDirectors" xlink:to="SGLB_StockBasedCompensationDirectors_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockBasedCompensationDirectors_doc" xml:lang="en-US"> Stock Based Compensation - Directors. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants" xlink:to="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrants_doc" xml:lang="en-US"> Sock iissued during period value for exercise of preferred warrants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares" xlink:to="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockIssuedDuringPeriodValueForExerciseOfPreferredWarrantsShares_doc" xml:lang="en-US"> Stock issued during period value for exercise of preferred warrants shares. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockIssuedDuringPeriodValueReverseStockSplits" xlink:to="SGLB_StockIssuedDuringPeriodValueReverseStockSplits_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockIssuedDuringPeriodValueReverseStockSplits_doc" xml:lang="en-US"> Issuance of fractional shares from reverse split. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockOptionsMember" xlink:to="SGLB_StockOptionsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_StockOptionsMember_doc" xml:lang="en-US"> Stock Options [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_TwentyTwoEmployeesAndTwoConsultantMember" xlink:label="SGLB_TwentyTwoEmployeesAndTwoConsultantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwentyTwoEmployeesAndTwoConsultantMember" xlink:to="SGLB_TwentyTwoEmployeesAndTwoConsultantMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_TwentyTwoEmployeesAndTwoConsultantMember_doc" xml:lang="en-US"> 22 Employees and 2 Consultant [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_TwoThousandThirteenStockOptionPlanMember" xlink:label="SGLB_TwoThousandThirteenStockOptionPlanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoThousandThirteenStockOptionPlanMember" xlink:to="SGLB_TwoThousandThirteenStockOptionPlanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_TwoThousandThirteenStockOptionPlanMember_doc" xml:lang="en-US"> 2013 Stock Option Plan [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember" xlink:to="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_TwoThousandTwentyStockAppreciationRightsPlanMember_doc" xml:lang="en-US"> 2020 Stock Appreciation Rights Plan [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoThousandandThirteenStockOptionPlanMember" xlink:to="SGLB_TwoThousandandThirteenStockOptionPlanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_TwoThousandandThirteenStockOptionPlanMember_doc" xml:lang="en-US"> 2013 Stock Option Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_WarrantsMember" xlink:label="SGLB_WarrantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_WarrantsMember" xlink:to="SGLB_WarrantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_WarrantsMember_doc" xml:lang="en-US"> Warrants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IssuanceOfSecuritiesForServices" xlink:to="SGLB_IssuanceOfSecuritiesForServices_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_IssuanceOfSecuritiesForServices_doc" xml:lang="en-US"> Issuance of Securities for Services. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_OptionStrikePrice" xlink:to="SGLB_OptionStrikePrice_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_OptionStrikePrice_doc" xml:lang="en-US"> Option strike price. </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_TwoEmployeesMember" xlink:label="SGLB_TwoEmployeesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_TwoEmployeesMember" xlink:to="SGLB_TwoEmployeesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_TwoEmployeesMember_doc" xml:lang="en-US"> Two Employees [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_EmployeeOneMember" xlink:label="SGLB_EmployeeOneMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_EmployeeOneMember" xlink:to="SGLB_EmployeeOneMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_EmployeeOneMember_doc" xml:lang="en-US"> Employee One [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="sglb-20210331.xsd#SGLB_EmployeeTwoMember" xlink:label="SGLB_EmployeeTwoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_EmployeeTwoMember" xlink:to="SGLB_EmployeeTwoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_EmployeeTwoMember_doc" xml:lang="en-US"> Employee Two [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_doc" xml:lang="en-US"> Share based compensation arrangement by share based paymen award vesting date. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_IronDomeVenturesLLCMember" xlink:to="SGLB_IronDomeVenturesLLCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_IronDomeVenturesLLCMember_doc" xml:lang="en-US"> Iron Dome Ventures, LLC [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ClassOfWarrantOrRightFairValuePerShare" xlink:to="SGLB_ClassOfWarrantOrRightFairValuePerShare_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_ClassOfWarrantOrRightFairValuePerShare_doc" xml:lang="en-US"> Fair Value per Share. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_DerivativeLiabilityExpectedTermConversionFeature" xlink:to="SGLB_DerivativeLiabilityExpectedTermConversionFeature_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_DerivativeLiabilityExpectedTermConversionFeature_doc" xml:lang="en-US"> Derivative liability expected term conversion feature. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_FiveEmployeesMember" xlink:to="SGLB_FiveEmployeesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="SGLB_FiveEmployeesMember_doc" xml:lang="en-US"> Five Employees [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_StockOptionsMember" xlink:to="SGLB_StockOptionsMember_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_StockOptionsMember_3_lbl" xml:lang="en-US"> StockOptionsMember </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_2_lbl" xml:lang="en-US"> Assets, Current </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrent_2_lbl" xml:lang="en-US"> Assets, Noncurrent </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_2_lbl" xml:lang="en-US"> Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_2_lbl" xml:lang="en-US"> Liabilities, Current </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_2_lbl" xml:lang="en-US"> Liabilities </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_4_lbl" xml:lang="en-US"> Stockholders' Equity Attributable to Parent </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_2_lbl" xml:lang="en-US"> Liabilities and Equity </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GrossProfit_2_lbl" xml:lang="en-US"> Gross Profit </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_2_lbl" xml:lang="en-US"> Operating Income (Loss) </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_2_lbl" xml:lang="en-US"> Interest Expense </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpense_2_lbl" xml:lang="en-US"> Nonoperating Income (Expense) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2_lbl" xml:lang="en-US"> Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:to="us-gaap_PreferredStockDividendsIncomeStatementImpact_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsIncomeStatementImpact_2_lbl" xml:lang="en-US"> Preferred Stock Dividends, Income Statement Impact </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2_lbl" xml:lang="en-US"> Net Income (Loss) Available to Common Stockholders, Basic </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesOutstanding_3_lbl" xml:lang="en-US"> Shares, Outstanding </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_2_lbl" xml:lang="en-US"> Increase (Decrease) in Accounts Receivable </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInInventories_2_lbl" xml:lang="en-US"> Increase (Decrease) in Inventories </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_2_lbl" xml:lang="en-US"> Increase (Decrease) in Prepaid Expense and Other Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayableTrade" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableTrade_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade_2_lbl" xml:lang="en-US"> Increase (Decrease) in Accounts Payable, Trade </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_2_lbl" xml:lang="en-US"> Increase (Decrease) in Deferred Revenue </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_2_lbl" xml:lang="en-US"> Increase (Decrease) in Accrued Liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_2_lbl" xml:lang="en-US"> Net Cash Provided by (Used in) Operating Activities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2_lbl" xml:lang="en-US"> Payments to Acquire Property, Plant, and Equipment </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireIntangibleAssets" xlink:to="us-gaap_PaymentsToAcquireIntangibleAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_2_lbl" xml:lang="en-US"> Payments to Acquire Intangible Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_2_lbl" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering" xlink:to="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_2_lbl" xml:lang="en-US"> Payments for Repurchase of Initial Public Offering </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfNotesPayable" xlink:to="us-gaap_RepaymentsOfNotesPayable_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfNotesPayable_2_lbl" xml:lang="en-US"> Repayments of Notes Payable </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_2_lbl" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_2_lbl" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_3_lbl" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureTextBlock" xlink:to="us-gaap_InventoryDisclosureTextBlock_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureTextBlock_2_lbl" xml:lang="en-US"> Inventory Disclosure [Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_2_lbl" xml:lang="en-US"> Derivative Instruments and Hedging Activities Disclosure [Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_2_lbl" xml:lang="en-US"> Stockholders' Equity Note Disclosure [Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="us-gaap_WarrantsAndRightsOutstanding_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantsAndRightsOutstanding_3_lbl" xml:lang="en-US"> Warrants and Rights Outstanding </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_3_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice" xlink:to="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="SGLB_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice_4_lbl" xml:lang="en-US"> ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice </link:label>
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7 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 8/14/23  Sigma Additive Solutions, Inc.    424B5                  1:457K                                   M2 Compliance LLC/FA
 9/14/21  Sigma Additive Solutions, Inc.    S-8         9/14/21    3:198K                                   M2 Compliance LLC/FA
 8/10/21  Sigma Additive Solutions, Inc.    S-8         8/10/21    3:127K                                   M2 Compliance LLC/FA
 7/02/21  Sigma Additive Solutions, Inc.    424B5                  1:524K                                   M2 Compliance LLC/FA
 6/21/21  Sigma Additive Solutions, Inc.    424B3                  1:227K                                   M2 Compliance LLC/FA
 6/11/21  Sigma Additive Solutions, Inc.    S-3                    4:1.1M                                   M2 Compliance LLC/FA
 6/09/21  Sigma Additive Solutions, Inc.    S-3                    3:337K                                   M2 Compliance LLC/FA


2 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/30/21  Sigma Additive Solutions, Inc.    8-K:1,3,8,9 3/25/21    7:589K                                   M2 Compliance LLC/FA
 1/12/21  Sigma Additive Solutions, Inc.    8-K:1,3,8,9 1/08/21    9:676K                                   M2 Compliance LLC/FA
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Filing Submission 0001493152-21-009466   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

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