Yard Odor Killer safely and effectively eliminates stool and urine odors on any outdoor surface. Safe to use on grass, plants, shrubs, patios, kennels, dog runs, swing sets, fences, block walls or any other surface where odors arise due to pets. Just connect sprayer to a garden hose, turn on water and begin spraying. Yard Odor Killer quickly destroys offensive odors at their source: not a masking agent and no disinfectant smell. Concentrated formula covers up to 15,000 square feet. Active Ingredient: Alkyl Dimethyl Benzylammonium Chloride. Shipping weight: 2 1/2 lbs.