12 oz. White Loctite Tite Foam Window and Door is an innovative polyurethane-based insulating foam sealant that expands to fill, seal, and insulate around window and door jambs. It is a polymer foam based on purified and concentrated ingredients that deliver premium durability. Tite Foam Window and Door is a specialized formula that expands with low pressure so that it does not bow or warp window or door frames. It is easy to use and apply with its attached straw applicator. Strong adhesion and flexibility allow for a durable seal to keep air and moisture out.