Polyken/Nashua 361-11 Waterproofing Repair Tape is a tape with an aluminum foil backing/carrier which is coated on one side with a permanent butyl rubber adhesive. The tape forms a permanent seal with excellent adhesion to all surfaces. Nashua 361-11 is also extremely conformable and resistant to cold, heat, water, and sunlight. Its silver foil backing is paintable which helps match surfaces. Typically used for indoor and outdoor sealing and repair of gutters, roof alleys, eaves, hips, and ridges. Nashua 361-11 Waterproofing Repair Tape can also repair seams and seal leaks, rips, and tears in pipes, hoses and in metal panels of trailers, shipping containers, and metal buildings.