When you have a clogged sink, tub, shower, or other drain, take charge and get it flowing fast with professional strength Drano commercial clog remover. The thick bleach formula in Drano Max Gel Commercial Line cuts right through standing water, clinging to your toughest clogs to blast them fast. As an industrial drain cleaner, commercial Drano Max Gel starts working in 15 minutes to completely remove built up blockages. It's safe to use on metal and plastic pipes and made without phosphorus. Conquer tough clogs whenever they happen with Drano commercial gel drain opener. Its pro strength formula works great to remove hair clogs, soap scum, standing water, slow drains, and pipe build ups. Just pour, wait, and flush drain. See instructions on bottle for additional usage instructions and precautions.