Nashua pro choice 681507 Nashua waterproofing repair tape seals cracks and seams in gutters, roof alleys, eaves, hips and ridges repair gouges, rips and tears in metal panels of trailers, shipping containers and metal buildings sealing leaking pipes and hoses permanent waterproofing and sealing applications aluminum foil backing butyl rubber adhesive tough and durable resists UV exposure outdoors conformable and paintable forms an instant air-tight and waterproof bond permanent non-staining total thickness 11 mils.