Effective in removing uric scale from deep inside black water systems. Formulated to target uric scale and clean sewage systems from toilet to tank, will dissolve clogs which cause plumbing to overflow and create nasty odors. One gallon will make 5 to 8 gallons of ready-to-use solution. When used as directed, Sew Clean™ is non-corrosive to most metals commonly found in black water systems.Biodegradable and can be disposed through regular sewer systemPassed the California Fish Toxicity Assay Test, Department of Hazardous Substances (Title 22) and complies with NSF International standard 60Based on current EPA guidelines, is classified as nonflammable and meets all requirements regarding hazardous and dangerous materials