1" x 10' Black 3M 2228 Rubber Mastic Electrical Tape $324.27 1" x 10' Black 3M 2228 Rubber Mastic Electrical TapePad, seal and insulate bus bar and splice connections.Moisture and UV resistant. Operating temperature up to 194 degrees F. Bus bars up to 35,000V, wires up to 1,000V. Ethylene Propylene Rubber backing... Add to Cart