Unclog drains and fight odors, guaranteed or your money back, with the 2-in-1 action of Liquid-Plumr Foaming Clog Fighter. Two liquids activate on contact, creating a powerful foam that you can see cleaning your drain. The smart formula penetrates in and around clogs to destroy hair, soap scum and grease. Plus, it fights odors as it cleans. Perfect for clogs in your bathtub, shower, bathroom sink, kitchen sink and garbage disposal, the deep cleaning foam stays in pipes 4x longer, making it a faster, better way to clear slow drains. This clog remover and drain cleaner is safe for all septic systems and pipes, including PVC, plastic, copper and old pipes. Do not use with a plunger, in toilets or with ammonia, toilet bowl cleaners, or non-Liquid-Plumr clog removers (to avoid hazardous gas). Liquid-Plumr contains biodegradable surfactants and no phosphorous. Excessive heat or cold may cause some ingredients in Liquid-Plumr to form clumps, but this should not affect its performance.