Santeen Pure Lye is an industrial-strength cleaner for drains, grease traps, septic systems, and roots. This 99% pure, bead-size lye is the purest worldwide. As a natural, non-acid drain opener, Pure Lye is odorless, safe for fine fixtures, chrome trim, and metal or plastic pipes. It clears clogs and slow drains without harming septic tanks or cesspools. Environmentally safe, Santeen Pure Lye instantly dissolves grease, hair, and roots in sewer lines. It can be diluted to any strength and enhances active bacteria growth in grease traps and septic tanks with regular use. It can be stored indefinitely without the risk of escaping odors.