Formulated 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 Cleaner; Applicable Material: Metal; Plastic; PVC; Dirt Types: Food Debris; Grease; Hair; Oil-Based Soils; Organic Matter; Water-Based Soils; Scent: Unscented.