No shrink, minimal expansion foam formulation. It foams, bugproofs, insulates, caulks, waterproofs, and seals. Bonds to plywood, styrofoam, urethane foam board, glass, and most plastics. Can be painted or sanded. Seals and insulates vans and campers. Tack-free in 45 minutes, completely cured in 8 hours. 2 year shelf life. UL classified. No CFC’s.