Formulated and manufactured at our location in Alpharetta GA, USA, this product is a water based, non flammable, eco friendly roof cleaner. Use this product as a Roof surface preparation before application of protective roof coatings. It does not contain hydrocarbon solvents or acids. Roofwash has to be diluted with 15 parts of water before it can be used. Use several spray equipment to apply the products. In diluted form it is not harmful to the substrate or vegetation.