PTK80 Waterseal mastic tape is a conformable self-fusing rubber electrical insulating and sealing tape.

PTK80 consists of ethylene propylene rubber (EPR) and butyl mastic adhesive. It has strong adhesion to copper, Aluminum, and cable jackets. It provides excellent waterproofing performance and temperature stability at 90℃, and withstanding of overload temperature up to 130℃.