Kem4 is the most potent degreaser around because it is made exclusively by experienced K-KLEEN Kitchen Exhaust Cleaning Specialists who know exactly what other hood cleaners need in order to tackle the toughest of grease problems. Kem4 is highly corrosive and is guaranteed to break up grease quickly. There is nothing else available that is even near being similar to this product. Simply mix with cold water and apply to the affected area with anything from a spray bottle to a pressure washer. This is a powder degreaser made at an industrial strength and should only be used by professionals.