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Using cartridges of 404 Duct sealant with Caulk Gun to seal longitudinal seams on inside #ductsealing #mastic #sheetmetalductwork #unionsheetmetalworkers | ductfab
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Hvac technician shows money saving tip on how to properly seal ducts with mastic and tape. Leaking ducts can cost hundreds in additional energy costs on your power bill. #HVACExperts #hvactechnician #hvacapprentice When using tools such as those depicted in this video utilize extreme caution and wear proper PPE | Alex Ivey
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