Mfm Building 50004 Aluminum Peel And Seel, 4"Used where waterproofing is needed. Weatherproof. For roofing, patching, gutter repair, flashing, and general waterproofing where the membrane will be exposed. A laminate of reflective aluminum foil, rugged, cross linked polymer films, and a thick layer of rubberized asphalt. Designed for low slope roof applications. For mobile homes, trailers, RVs, and sunrooms. The asphalt compound adheres to most surfaces and seals around most punctures, forming a