Liquid Plumr Full Clog Destroyer Pro Strength 2 pk.128 oz. Bottles Two 128 ounce bottles of Liquid-Plumr Pro-Strength Full Clog Destroyer Plus PipeGuard works quickly on fully blocked, slow flowing drains and garbage disposals Easy to use Full Clog Destroyer has a triple action formula that pours through standing water to unblock full clogs, protects pipes and keeps pipes clog free at the same time while fighting odors PipeGuard technology protects pipes and keeps pipes clog free with a repellent barrier that prevents grime from sticking to pipe walls Simply pour 16 ounces down the drain, wait 15 minutes, then rinse with hot water to unclog fully blocked drains, slow flowing drains and garbage disposals Pro-Strength Full Clog Destroyer Plus PipeGuard drain cleaner is safe for all septic systems and pipes, including PVC, plastic, copper and old pipes