Roebic Root Killer clears roots from pipes and effectively stops new root growth, keeping your lines from clogging caused by tree and shrub roots. Roots naturally seek out small openings in pipelines in search of water, and once they penetrate a pipe, rapid growth can cause blockages. This proven formula has a long history of success in clearing sewers and drains of root growth. It is fast and easy to use, and it is harmless to the beneficial bacteria in septic tanks and cesspools. Roebic Root Killer is to prevent root blockages for a full year, providing reliable protection and peace of mind. The product comes in a convenient 2 lb. bottle. Model Number: K77