Roebic Foaming Root Killer is specially formulated for severe and recurring root problems in sewer lines. This powerful treatment foams on contact with water, effectively filling the entire sewer line to eliminate roots and keep your pipes running ly. Designed for annual use, it provides a reliable solution to maintain clear and unobstructed plumbing. Unlike some other products, it does not contain copper sulfate, making it a safer choice for your sewer system. Packaged in a convenient 1-pound jar, this root killer is easy to use and highly effective in protecting your pipes from root intrusion. Model Number: FRK