TEROSON® VR 620 is a transparent super-penetrating oil designed to free rusted or frozen nuts, bolts, screws, fittings, and other fasteners in automotive and industrial equipment. It can also be used to clean tar, grease, dirt, and other carbon deposits from parts before lubrication. The product is a blend of refined petroleum oils and additives. It offers easy application from an aerosol can, and leaves a thin film that lubricates and prevents rust.