Bloc-Aid is a ready-to-use, non-acid, liquid drain and sewer cleaner plus maintainer. A small amount of Bloc-Aid used regularly in free-flowing drains will help prevent common sludge build-ups that cause drains to become slow and eventually cause clogs. It is safe to use in garbage disposals, septic tanks and cesspools without harm to plumbing.

Spartan® Drain Cleaner, 1 qt Container, Liquid Form, Red, Odorless Odor/Scent, >13.5 pH, 1.38 Specific Gravity, Composition: Water, Sodium Hydroxide