The Scotch Rubber Mastic Tape 2228 is a conformable self-fusing rubber electrical insulating and sealing tape. Scotch® Rubber Mastic Tape 2228 consists of an ethylene propylene rubber (EPR) backing coated with an aggressive, temperature-stable mastic adhesive. The tape is made 65 mils (1,65 mm) thick for quick application build–up. It is designed for electrical insulating and moisture-sealing applications. Scotch® Rubber Mastic Tape 2228 is a UL-recognized component for applications up to 130⁰C. It offers excellent resistance to moisture and ultraviolet exposure and is intended for both indoor and weather-exposed outdoor applications.