Max Gel Clog RemoverFormulated thick to dissolve the toughest clogs. Heavier-than-water formula pours straight through standing water and works quickly to restore drains. Has a special ingredient that protects pipes from corrosion. Safe for plastic, PVC and metal pipes as well as garbage disposals and septic systems. Contains no phosphorus. Application: Drain Openers; Plumbing; Applicable Material: Metal; Plastic; PVC.