This is a black 65 mil conformable self-fusing rubber electrical insulating and sealing tape. Packed in bulk with 12 rolls per case This Scotch® Rubber Mastic Tape 2228 consists of Ethylene Propylene Rubber (EPR) backing coated with a strong, temperature-stable mastic adhesive. Use this tape to insulate, pad, and seal bus bar and splice connections. Its temperature-rated at 194(deg)