Easy to work with & extremely flexible, A-Seal forms around almost anything from a seam or tear to a leaking drain pipe. Once on, it stays flexible but never loses its adhesion if properly applied. A-Seal has aggressive sealing qualities with an aluminum backing laminated to the adhesive. The Aluminum backing is 4-mil thick aluminum sheeting, not 2-mil foil like most tapes. A-Seal can be painted to match the repaired surface color. Perfect for trailers that need resealing over seams and rivets. It is also perfect for storage tanks, steel and aluminum roofs, etc. 6 INCH X 6 INCH PATCH KIT ALUMINUM.