Drano® has your back with maximum strength for your worst clogs--or your money back. Visit drano.com for details. Drano® Max Gel Clog Remover--unclog your drain with a maximum-strength gel formula. Drano® Max Gel pours through standing water and works fast to clear clogged drains and restore them to a free-flowing state. Safe for all pipes, it works great to remove hair, soap scum, and other gunky clogs. Drano® Max Gel pours through standing water and works fast to clear clogged drains and restore them to a free-flowing state. Safe for all pipes, it works great to remove hair, soap scum, and other gunky clogs. Formulated Thick to Dissolve the Toughest Clogs Fast Pours Through Water Straight to the Clog Has an Ingredient to Protect Pipes from Corrosion Won't Harm Pipes When Used Overnight Contains no Phosphorus Safe for Plastic, PVC, Metal Pipes, Garbage Disposals and Septic Systems