Pet Organics NO-GO has been developed to help you housebreak your pet. NO-GO is not a repellent. When sprayed on the soiled area, NO-GO will eliminate the urine scent so your pet will not re-urinate in that area. Works great on indoor plants and Christmas Trees too For outdoor plants, use Pet Organics Pet Stopper. NO-GO contains no harsh chemicals. Safe to use on almost all fabrics. However, before using product test on small inconspicuous area of surface.