3M™ Polyester Film Electrical Tape 56, 2 in x 72 yd, paper core, Bulk, (SLP), 24/Case. 3M™ Polyester Film Electrical Tape 56 is a moisture resistant, electrical tape. This tape is suitable for insulating applications that require high dielectric strength. This tape is 600V rated and withstands a temperature range of 32 to 266 °F (0 to 130 °C).