Designed to fill, seal, bond, retrofit, insulate, and deaden sound in and around cracks and cavities. Forms a permanent, waterproof and airtight bond to masonry, wood, glass, metal, and most plastics. Stops drafts, dust, moisture, insects and rodents. When cured, foam can be sanded, painted or stained. The low expansion formula expands 50% when fully cured. Cured foam insulates to R-5 for each inch of foam. UL classified as a caulking sealant. Foam and propellant are non-flammable. Convenient 360º valve - can be sprayed from any position. Reusable for up to 30 days after initial use.