Hardcast CCWI-181 by Carlisle is an all-purpose HVAC duct sealant designed for sealing joints, seams, and connections in metal ductwork, fiberglass duct board, flex duct, duct fabric, and flexible tubing runouts.
CCWI-181 incorporates built-in polyester reinforcement for added strength and includes UV inhibitors for indoor and outdoor applications. It is suitable for residential and commercial HVAC air-distribution systems.
The sealant is UL 181A-M listed for rigid fiberglass duct systems and UL 181B-M listed for flexible air duct systems. This listing includes one 1-gallon pail of Hardcast CCWI-181 duct sealant.
