Polyken® 820 MegaGrip™ Permanent Waterproof Tape is a heavy-duty polyethylene film tape designed for permanent waterproof sealing, patching, and repair applications. Featuring an aggressive rubber adhesive, it bonds securely to a wide variety of surfaces including concrete, sheet metal, aluminum, copper, PVC, plastic, and other construction materials.
The flexible polyethylene backing conforms to irregular surfaces while providing excellent resistance to moisture, weather, and temperature fluctuations. Designed for both above-water and underwater applications, Polyken® 820 delivers a durable watertight seal for demanding construction, maintenance, and waterproofing projects.