A high performance, commercial strength, bio-enzymatic pet odor and stain remover. It breaks down uric acid salt crystals in urine which eliminates the primary trigger mechanism for marking. It is not a perfume or cover-up but actually eliminates all three major components of urine. It works on fresh urine stains, as well as old ones too! (even years old) It is safe around pets and available in both dog and cat formulations to work on the unique properties of each pet's urine. It works so well that hospitals, nursing homes and flooring installers world wide are solving some of their toughest challenges. Urine off has the seal of approval from the carpet and rug institute.