Drano Max Gel Clog Remover is the #1 Selling Gel Drain Cleaner*, offering maximum strength for even your worst clogs. The thick bleach formula in this drain clog remover cuts right through standing water, clinging to tough clogs to blast them fast. It includes an ingredient that protects pipes from corrosion and works great to remove hair, soap scum and other gunky clogs. Drano Max Gel Clog Remover gets to work in 7 minutes and is safe for use on PVC, metal pipes, garbage disposals, septic systems, kitchen and other drains like laundry sinks. Simply pour the clog remover liquid slowly over the drain, let it work for 15 to 30 minutes and flush with hot water. This clog remover liquid can also be left overnight to remove the toughest clogs.