WD-40 Specialist Cleaner & Degreaser is a water-based, non-flammable, non-aerosol cleaner & degreaser with a unique bio-solvent formula engineered to be powerful yet safe for sensitive surfaces. It quickly breaks through tough grease & grime and has added corrosion inhibitors to help protect against flash rust. Great for cleaning greasy automotive parts, tools, shop floors, industrial machinery, commercial appliances and equipment. It can even be used in cleaning equipment such as power washers and ultrasonic tool cleaners if rinse is discharged to wastewater treatment.