Coil cleaner is a blend of powerful, fast acting detergents, specifically formulated to clean even the dirtiest evaporator and condensor coils. This cleaner features an expanding and self advancing foam formula designed to penetrate coil beds. It is nontoxic, allowing for safe handling. It has a mild pleasant odor, allowing for it to be used with the CoilPro products without having to vacate occupied areas. Coil Cleaner is biodegradable and can be safely washed down drains.