Red Devil Foam & Fill Fire Block Expanding Polyurethane Sealant – 12 oz.

Foam & Fill® Fire Block is a self-extinguishable polyurethane foam sealant that fills, insulates, and seals interior and exterior gaps and cracks, preventing fire from passing through residential utility penetrations. This foam sealant, designed to prevent air penetration, inhibits the spread of fire, smoke, and gas into walls and ceilings.