Bio-Kleen Kleen Waste holding tank treatment is a highly efficient and concentrated dual-action enzyme and quaternary designed to control odor, waste, tissue and various buildup with regular use. Ensuring clean, properly maintained, odor-free black and grey tanks within your boat or RV. Kleen Waste is formaldehyde free, safe and 100% biodegradable. Safe for septic systems and can be used to clean and deodorize drains, disposals, bilges, portable toilets and latrines. Dual-action enzyme and quaternary Formaldehyde-free Lubricates, deodorizes and cleans lines, valves and probes Breaks down waste and all tissue in black and grey tanks Biodegradable formula MODEL NO - M01709