Flex-Grip 550 is a fiber-free, all-purpose duct sealant for use on all types of metal duct, fiberglass duct board, flex duct, and duct fabric. Distinguished by its ability to accomodate minor vibration and movement, Flex-Grip 550 stays flexible and will not crack. Flex-Grip’s excellent coverage rates and brush-on application reduce the amount of sealant used and lower the labor cost of the installation.

Water-based, heavy texture, UL 181B-M, up to 16" w.c., mold/mildew properties, excellent UV resistance.