Fast-evaporating contact cleaning oil. which dissolves dirt. grease. oil and resin residues. corrosion. oxide. oxidized deposits. sulfates. sulfides. carbonates, etc. Restores good electrical conductivity. Do not use on live equipment. Areas of use: car, truck, bus, trailer, tractor, etc. lighting system lamp connectors. plug connections. fuses. contacts. printed circuit boards. It is recommended to protect the treated surfaces with CRC 5-56 universal oil or CRC HD Vaseline petroleum jelly grease. to prevent corrosion.