Nashua 361-11 Waterproofing Repair Foil Tape combines tough, durable aluminum foil with tacky butyl rubber adhesive to form an instant airtight and waterproof bond that permanently seals leaks and gaps. Ideal for sealing pipes, gutters, roof alleys, trailers, shipping containers, and more, this foil tape adheres quickly to almost any surface and is cold, heat, and water resistant. It can be used both indoors and outdoors. The tape measures 1.89 inches by 10.9 yards.