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.