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  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_sif_RedemptionOfPerpetualBond_label_en" xlink:label="lab_sif_RedemptionOfPerpetualBond" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Redemption of perpetual bond</link:label>
    <link:label id="lab_sif_RedemptionOfPerpetualBond_documentation_en" xlink:label="lab_sif_RedemptionOfPerpetualBond" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Total transactions with owners of the Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_RedemptionOfPerpetualBond" xlink:href="sif-2025-12-31.xsd#sif_RedemptionOfPerpetualBond"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_RedemptionOfPerpetualBond" xlink:to="lab_sif_RedemptionOfPerpetualBond" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities_label_en" xlink:label="lab_sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Adjustments for decrease (increase) in contract assets and adjustments for increase (decrease) in contract liabilities</link:label>
    <link:label id="lab_sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities_documentation_en" xlink:label="lab_sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Adjustments for decrease (increase) in contract assets and adjustments for increase (decrease) in contract liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities" xlink:href="sif-2025-12-31.xsd#sif_AdjustmentsForDecreaseIncreaseInContractAssetsAndAdjustmentsForIncreaseDecreaseInContractLiabilities"/>
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    <link:label id="lab_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities_label_en" xlink:label="lab_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Initial direct costs on operating lease contracts paid, classified as operating activities</link:label>
    <link:label id="lab_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities_documentation_en" xlink:label="lab_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Initial direct costs on operating lease contracts paid, classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities" xlink:href="sif-2025-12-31.xsd#sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities" xlink:to="lab_sif_InitialDirectCostsOnOperatingLeaseContractsPaidClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_LogisticAndOtherProjectRelatedExpense_label_en" xlink:label="lab_sif_LogisticAndOtherProjectRelatedExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Logistic and other project related expense</link:label>
    <link:label id="lab_sif_LogisticAndOtherProjectRelatedExpense_documentation_en" xlink:label="lab_sif_LogisticAndOtherProjectRelatedExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Logistic and other project related expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_LogisticAndOtherProjectRelatedExpense" xlink:href="sif-2025-12-31.xsd#sif_LogisticAndOtherProjectRelatedExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_LogisticAndOtherProjectRelatedExpense" xlink:to="lab_sif_LogisticAndOtherProjectRelatedExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_02a12fce-db02-46cb-ac5e-eda9720131fd_totalLabel_en" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Increase (decrease) through transactions with owners, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"/>
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    <link:label id="lab_sif_FacilitiesHousingAndMaintenanceExpense_label_en" xlink:label="lab_sif_FacilitiesHousingAndMaintenanceExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Facilities, housing and maintenance expense</link:label>
    <link:label id="lab_sif_FacilitiesHousingAndMaintenanceExpense_documentation_en" xlink:label="lab_sif_FacilitiesHousingAndMaintenanceExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Facilities, housing and maintenance expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_FacilitiesHousingAndMaintenanceExpense" xlink:href="sif-2025-12-31.xsd#sif_FacilitiesHousingAndMaintenanceExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_FacilitiesHousingAndMaintenanceExpense" xlink:to="lab_sif_FacilitiesHousingAndMaintenanceExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_CurrentPrepaymentsAndOtherCurrentReceivables_label_en" xlink:label="lab_sif_CurrentPrepaymentsAndOtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Current prepayments and other current receivables</link:label>
    <link:label id="lab_sif_CurrentPrepaymentsAndOtherCurrentReceivables_documentation_en" xlink:label="lab_sif_CurrentPrepaymentsAndOtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Current prepayments and other current receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_CurrentPrepaymentsAndOtherCurrentReceivables" xlink:href="sif-2025-12-31.xsd#sif_CurrentPrepaymentsAndOtherCurrentReceivables"/>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_ac5044fe-c9d5-486b-a600-fea2e3f48f9e_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Cash flows from (used in) financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability_label_en" xlink:label="lab_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Current loans and borrowings - excl sale and leaseback liability</link:label>
    <link:label id="lab_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability_documentation_en" xlink:label="lab_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Current loans and borrowings - excl sale and leaseback liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:href="sif-2025-12-31.xsd#sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:to="lab_sif_CurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_1f0eb8b1-3416-4ef1-a7cf-32731166304d_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Cash flows from (used in) investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_CurrentPayablesOnSocialSecurityAndWageTax_label_en" xlink:label="lab_sif_CurrentPayablesOnSocialSecurityAndWageTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Current payables on social security and wage tax</link:label>
    <link:label id="lab_sif_CurrentPayablesOnSocialSecurityAndWageTax_documentation_en" xlink:label="lab_sif_CurrentPayablesOnSocialSecurityAndWageTax" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Current payables on social security and wage tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_CurrentPayablesOnSocialSecurityAndWageTax" xlink:href="sif-2025-12-31.xsd#sif_CurrentPayablesOnSocialSecurityAndWageTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_CurrentPayablesOnSocialSecurityAndWageTax" xlink:to="lab_sif_CurrentPayablesOnSocialSecurityAndWageTax" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_PersonnelExpensesDirect_label_en" xlink:label="lab_sif_PersonnelExpensesDirect" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Personnel expenses, direct</link:label>
    <link:label id="lab_sif_PersonnelExpensesDirect_documentation_en" xlink:label="lab_sif_PersonnelExpensesDirect" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Personnel expenses, direct</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_PersonnelExpensesDirect" xlink:href="sif-2025-12-31.xsd#sif_PersonnelExpensesDirect"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_PersonnelExpensesDirect" xlink:to="lab_sif_PersonnelExpensesDirect" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_NonCurrentSaleAndLeasebackFinanceLiabilities_label_en" xlink:label="lab_sif_NonCurrentSaleAndLeasebackFinanceLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Non-current sale and leaseback finance liabilities</link:label>
    <link:label id="lab_sif_NonCurrentSaleAndLeasebackFinanceLiabilities_documentation_en" xlink:label="lab_sif_NonCurrentSaleAndLeasebackFinanceLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Non-current sale and leaseback finance liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_NonCurrentSaleAndLeasebackFinanceLiabilities" xlink:href="sif-2025-12-31.xsd#sif_NonCurrentSaleAndLeasebackFinanceLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_NonCurrentSaleAndLeasebackFinanceLiabilities" xlink:to="lab_sif_NonCurrentSaleAndLeasebackFinanceLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_PersonnelExpensesIndirect_label_en" xlink:label="lab_sif_PersonnelExpensesIndirect" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Personnel expenses, indirect</link:label>
    <link:label id="lab_sif_PersonnelExpensesIndirect_documentation_en" xlink:label="lab_sif_PersonnelExpensesIndirect" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Personnel expenses, indirect</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_PersonnelExpensesIndirect" xlink:href="sif-2025-12-31.xsd#sif_PersonnelExpensesIndirect"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_PersonnelExpensesIndirect" xlink:to="lab_sif_PersonnelExpensesIndirect" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_CurrentSaleAndLeasebackFinanceLiabilities_label_en" xlink:label="lab_sif_CurrentSaleAndLeasebackFinanceLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Current sale and leaseback finance liabilities</link:label>
    <link:label id="lab_sif_CurrentSaleAndLeasebackFinanceLiabilities_documentation_en" xlink:label="lab_sif_CurrentSaleAndLeasebackFinanceLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Current sale and leaseback finance liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_CurrentSaleAndLeasebackFinanceLiabilities" xlink:href="sif-2025-12-31.xsd#sif_CurrentSaleAndLeasebackFinanceLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_CurrentSaleAndLeasebackFinanceLiabilities" xlink:to="lab_sif_CurrentSaleAndLeasebackFinanceLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_916e7886-acbb-45db-a045-e877392ae599_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Cash flows from (used in) operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets_label_en" xlink:label="lab_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Adjustments for depreciation, amortisation and impairment, property, plant and equipment and intangible assets</link:label>
    <link:label id="lab_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets_documentation_en" xlink:label="lab_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Adjustments for depreciation, amortisation and impairment, property, plant and equipment and intangible assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets" xlink:href="sif-2025-12-31.xsd#sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets" xlink:to="lab_sif_AdjustmentsForDepreciationAmortisationAndImpairmentPropertyPlantAndEquipmentAndIntangibleAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities_label_en" xlink:label="lab_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Proceeds from government grants, classified as operating activities</link:label>
    <link:label id="lab_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities_documentation_en" xlink:label="lab_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Proceeds from government grants, classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities" xlink:href="sif-2025-12-31.xsd#sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities" xlink:to="lab_sif_ProceedsFromGovernmentGrantsClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability_label_en" xlink:label="lab_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Non-current loans and borrowings - excl sale and leaseback liability</link:label>
    <link:label id="lab_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability_documentation_en" xlink:label="lab_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">LongtermBorrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:href="sif-2025-12-31.xsd#sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:to="lab_sif_NonCurrentLoansAndBorrowingsExclSaleAndLeasebackLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_e2967957-63eb-4f8e-a1b5-8f0c3a03eb45_totalLabel_en" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Increase (decrease) in cash and cash equivalents after effect of exchange rate changes</link:label>
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