Foaming Root Drain Cleaner - 1 lb
This contains dichlobenil which kills the roots and prevents new growth. New root growth from outside the pipe joints are inhibited when they come into contact with the dichlobenil inside the pipe. The foam acts as a carrying agent to put the active ingredient in contact with the tree roots above the flow. Doesn't harm the surrounding trees or ground cover, doesn't contain copper sulfate and is recommended for severe recurring root problems.