Liquid-Plumr Professional Strength Drain Cleaner is a powerful gel cleaner which is designed to clear even the toughest clogs in just 7 minutes. It quickly gets to work on hair, gunk and soap scum, clearing both standing-water blockages and slow flowing drains. Use it in the bathtub, kitchen sink or garbage disposal. It is safe for all pipes, including PVC, plastic, copper, old pipes and septic systems.