Product developed for the proper cleaning of existing elastomeric coatings on roofs, metal surfaces, concrete, and masonry substrates as well as uncoated roof, deck, and wall surfaces. GAF Cleaning Concentrate Cleaner is non-toxic and leaves no pollutants or contaminating by-products to damage the environment. It has excellent cleaning capabilities with most types of coatings including acrylic, polyurethane silicone and Hypalon®. Because it is 100 % biodegradable, it can be washed off the surface without any harmful effects to the environment or ground vegetation. It penetrates the old coating, lifting the oxidized material, dirt, grease, and other contaminants into suspension for easy flushing from the substrate, leaving behind an acceptable surface for re-coating. (formerly known as United Coatings™ United Cleaning Concentrate (UCC))