Maximum strength for your worst clogs. Drano Max Gel is over 50% thicker than other drain openers. Gel so it clings to clogs longer to clear clogs better. Max Gel pours through standing water and works fast to restore your drains to their free-flowing state. Safe for all pipes, it's also the best at removing hair, soap scum, and other gunky clogs. Formulated thick to dissolve the toughest clogs fast. Pours through water straight to the clog. Has a special ingredient to protect pipes from corrosion. Safe for plastic, PVC, metal pipes, garbage disposals, and septic systems. Won't harm pipes when used overnight. Contains no phosphorus.