ComStar® pure Lye® is an industrial-strength, powerful tool to clear out drains, grease traps, septic systems and roots. This formula is the purest white, bead-size lye (sodium hydroxide) in the world, 99% pure. A natural drain opener, pure Lye® is bio-degradable, odorless and non-acidic, safe on fine fixtures, chrome trim and metal or plastic pipes. This amazing product clears out clogged and slow moving drains, grease traps and septic systems, without harming septic tanks or cesspools. Because of the unique bead shape, ComStar® pure Lye® will sink to the bottom of standing water and attack the cause of the blockage for a fast break-up. ComStar® pure Lye® does not stink or create fumes and has become a favorite drain opening product for homes, schools, hospitals, cafeterias, commercial buildings and restaurants.