Fight fully blocked drains and protect pipes with the triple action formula of Liquid-Plumr Pro-Strength Full Clog Destroyer plus PipeGuard. This easy to use Full Clog Destroyer has a powerful triple action formula that pours through standing water to unblock full clogs, protects pipes and keeps pipes clog free with regular monthly use. at the same time while fighting odors. The thick and powerful gel quickly coats the whole pipe, dissolving hair, soap scum build up, food and other organic matter to restore clear flowing drain and leaves a repellent barrier that prevents grime from sticking to pipe walls. Simply pour the 16 ounces down the drain, wait 15 minutes, then rinse with hot water. Liquid-Plumr Pro-Strength Full Clog Destroyer works great in slow flowing sinks and garbage disposals. This drain cleaner is safe for all septic systems and pipes, including PVC, plastic, copper and old pipes. Liquid-Plumr has you covered for everything from stinky sinks to fully clogged drains.