ComStar Pure Lye 30-620 Drain Cleaner, Liquid, Clear/White, Sharp, 2 lb Bottle

Bead form sodium hydroxide with blue dye dots, non-acid drain cleaner. Commercial Lye is odorless, non-fuming and safe on fine fixtures, chrome, brass, metal and plastic pipes. It contains blue dye for easy flow detection. It will not harm septic tanks or cesspools. Because Commercial Lye II is odorless, it is good for homes, schools, hospitals, cafeterias and restaurants.