ComStar's Valuline Evaporator Coil Cleaner is specially formulated to break down, liquefy and remove oily dirt that builds up on indoor evaporator coils. Evaporator coil contaminants are very different from contaminants that accumulate on outdoor condenser coils. Valuline Evaporator Coil Cleaner is biodegradable, non-toxic, neutral pH, and self-rising – NO WATER REQUIRED. This product is also a traditional green color. Valuline Evaporator Coil Cleaner is perfect for a 3-gallon sprayer; simply add 2 gallons of water and 1 gallon of this product. Valuline Evaporator Coil Cleaner forms part of ComStar's "Valuline" coil cleaner series which also includes ComStar's Valuline Condenser Coil Brightener and Cleaner and ComStar's Foaming Non-Acid Coil Brightener & Cleaner.