PURPLE POWER® is an effective and economical multi-purpose concentrate designed to remove oil, grease, rust stains, carbon, and dirt from engines, door jambs, tires, carpets, upholstery, and concrete floors. Dilute PURPLE POWER® with water to achieve the required solution strength. Free-rinsing, controlled foam. PURPLE POWER® is certified readily biodegradable according to independent OECD -301 testing.