DuPont Great Stuff Pro Gaps & Cracks 30oz. Gun Foam
DuPont 30oz Great Stuff Pro Gaps and Cracks is an insulating foam sealant for general purpose air sealing. The one-component, minimally expanding foam takes on the shape of cracks then quickly cures (within 1 hour) to form an air-tight seal. Gaps and Cracks is also recognized as a fireblock, able to resist the free passage of fire and smoke to other areas of the building.