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Free Shipping on orders over $49Duct-Seal 321 is an all-purpose industrial-grade duct sealant for all types of metal duct, fiberglass duct board, duct fabric and flex duct. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. This non-toxic water-based product is solvent free and is suitable for residential use.
Duct Sealant, Water Based, Duct-Seal™ 321, Gray, 1 gal, Temperature Rating: 35 to 110 Deg F, Specific Gravity 1.34 to 1.41, Pail Container, Base Content: Synthetic Latex, VOC 93 g/L (Less Water), Typical Latex With Slight Ammonia Odor, 212 Deg F Boiling Point, Gray Mastic Form, Standards: UL 181 B-M, For Use With: For Metal Duct, Glass Fiber Duct Board And Flex Duct
