Duct-Seal 321 is a GREENGUARD Gold-certified, 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

Product #304159 - 1 Case w/ (25) 11-oz. Cartridges (Gray)
Product #304156 - 1 Case w/ (4) 1-Gallon Pails (Gray)
Product #304158 - (1) 5-Gallon Pail (Gray)
Product #332926 - 1 Case w/ (4) 1-Gallon Pails (White)