Purple Power is a multi-purpose concentrate which is formulated to be both effective and economical. Purple Power removes oil, grease, rust stains, carbon, dirt, etc. from engines, door jambs, tires, carpets, upholstery, concrete floors, etc. Dilute with water to achieve ideal strength solution. Free-rinsing, controlled foam. Certified ‘readily biodegradable’ according to independent OECD -301 testing.