WD-40 Specialist_® Degreaser is an industrial-strength fast acting formula that quickly cleans tools, machinery, engines and equipment to look like new and run smooth. Contains a proprietary industrial-strength solvent that quickly breaks down grease, yet unlike other harsh degreaser solvents is safe on most surfaces including metals, plastics, rubber, glass, aluminum and more (if unsure test on a small area first). Great for use on automotive and truck engines, tractors, forklifts, gears and chains, industrial machinery, power equipment and other metal tools with heavy greasy soils & messes.