Electrical tape
Electrical tape (or insulating tape) is a type of pressure-sensitive adhesive tape used primarily to insulate electrical wire and cable splices. This type of tape is capable of withstanding conditions of extreme temperatures, corrosion, humidity and high voltages. The tape is made of thin PVC material, usually 14mm wide; one side of the tape is impregnated with an adhesive. PVC has been chosen because it is a low-cost, flexible material and has excellent electrical insulating properties, although it has the disadvantage of hardening with time and heat.