Degreaser contains no caustic soda (sodium hydroxide), no caustic potash (potassium hydroxide) or solvents of any kind. Degreaser is an excellent choice for degreasing engines at self-service carwashes and for use through hot or cold water high-pressure washers degreasing heavy equipment or fabricated industrial structures. Degreaser cuts through grease and oil utilizing a very effective surfactant system penetrating to the metal, lifting off all soils. Additionally, Degreaser rinses easily with water leaving behind a surface that is totally film-free. Degreaser is safe on untreated aluminum when used as directed.