C-139 De Aqua Lube (Aerosol) is a combination of penetrating lubricants (contain P.T.F.E.), moisture displacements compounds, solvents and corrosion inhibitors. It is used as a penetrating oil to loosen parts, which have become frozen by corrosion, and to displace moisture from electrical equipment such as contact points and automotive distributors, machinery parts, guns and equipment. C-139 De Aqua Lube (Aerosol) is used by factories, truck lines, delivery services, transit systems, machine shops, service stations, auto repair shops, farms, and general industries. IMPORTANT: Conforms to Military Specification MIL-C-23411 for corrosion prevention.