3M(TM) Glass Cloth Electrical Tape 27-1/2"x66', White, Rubber Thermosetting Adhesive, 1/2 in x 66 ft (13 mm x 20,1 m), 50 per case Ideal for electrical maintenance applications, this is a 7 mil woven glass cloth tape with a rubber thermosetting pressure-sensitive adhesive. UL Recognized 130(deg)C. Printable. Sold on a 1 inch paper core with an inner pack of 1/box with 10/carton. Scotch(R) Glass Cloth Tape 27 is edge-tear resistant, comformable, abrasion resistant; for use as a coil cover, anchor, banding and core, layer and crossover insulation. This tape is used for heat-stable insulation for furnace and oven controls, motor leads, and switches.