30 mil low voltage rubber splicing rubber tape made of high quality, unvulcanized rubber, which is suitable as a primary insulation for splices in electrical wires and cables of not more than 600 volts when used (over-wrapped) with a Friction or Vinyl tape. Superior insulating & bonding qualities make it an excellent choice for pipe repair, automotive, marine, construction & many other general uses. A self fusing rubber tape that bonds quickly to itself without heat into a solid mass that is watertight for electrical protection. Conforms to irregular shapes & flexible to withstand expansion & contraction. Resists bleach, steam, saltwater, oils, detergents & other chemicals. Meets requirements of ASTM D-119 and HH-I-553C, Grade B. UL510 Listing #2C58.