WD-40® Specialist® Industrial-strength degreaser fast-acting formula is a powerful solvent-based degreaser that quickly cleans machinery, engines and equipment to look like new and run smooth. Contains WD-40® PowerSolve Technology™, a proprietary 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). Ideal for use on automotive and truck engines, tire rims, tractors, forklifts, gears and chains, industrial machinery, power equipment and other metal tools. Safe on skin.