ROEBIC Laboratories K-77 ROOT KILLERK 77 Root Killer destroys clogging tree and shrub roots from pipes fast. When roots invade sewer pipes and clog septic system drain fields, Roebic's fast acting root killing formulas are needed. K 77 Root Killer clears roots from leach fields, improving drainage and flow. This can prevent standing water and soggy conditions from developing over a leach field. NOT AVAILABLE FOR EXPORT.