Spray this protective coating wherever small leaks occur, and they’ll stop in an instant! Use on chimney flashing, gutter joints, plumbing and pipe joints. Stops leaks and seals cracks in metal, wood, masonry, roof vents. Stays flexible, waterproof and weather-resistant. Won’t freeze, crack, peel or sag, and has no CFCs. 18-oz. aerosol can covers about 20 sq. ft. Cannot be shipped by air.