One component closed-cell expanding polyurethane foam sealant for lineal caulking applications. Air-moisture cure. Tack free in 20 minutes; fully cured in 12 hours. Paintable. Use for insulating and sealing around windows, doors, pipes, ducts and vents. Non-toxic when cured. Paint to protect from UV exposure. R value 4.7 (1in. thickness). Foam contains fire retarding chemical and is U.L. Listed but not rated as a firestop product. Environmental concerns have led us to replace CFC's and HCFC's with hydrocarbon material in our one component foam products. See instructions on each product to ensure safe use and quality results.