Concentrated chemical product specifically formulated for the elimination and prevention of root growth in sewer-type lines. Large root grade crystals are blended with an active wetting agent enabling R-D crystals to adhere to the root mass longer, dissolve slower and effectively kill and eliminate root blockages. R-D helps eliminate overflow damage, sewage flow restriction and back-up odors due to root penetration. Helps prevent sump and ejector pump root damage and motor overload from pumping into restricted line. Safe to use in lines leading to septic tanks, cesspools and dry wells when used as instructed. Will not destroy trees, shrubs, or other vegetation. Hercules Chemical Company, Inc. guarantees R-D to clear and prevent root blockages when used as directed. Guarantee terms are stated on package insert. Not for sale in Connecticut or the San Francisco Bay area of California.