Foam & Fill Large Gaps & Cracks Expanding Polyurethane Foam Sealant is quick and easy to use. It expands to fill holes, cracks, gaps and voids around windows, doors, pipes, outlets, vents and foundations. This insulating foam forms an airtight, waterproof bond and seals out drafts & moisture. Cured foam can be sanded, painted or stained. Contains no HCFCs or CFCs so it is safe for the environment. Use on Window and Door Frames, Pipes, Electrical Outlets, Vents & Foundations.