Urine-Off is a revolutionary new product that tackles, and beats, urine stains and odours. Unlike other urine removal products, which seal in and mask the odour, the enzymes in Urine-Off are specifically developed and combined to “eat” the uric acid crystals that cause lingering urine odours, crystals which are left behind by some other products. It does the job so well that even long-neglected problem areas with a high concentration of urine residue are quickly and easily taken care of, to the point that even your pet won’t be able to smell the urine, breaking unwanted behaviour patterns. 3.8 litre (1 US gallon) concentrated.