The key to keeping rats and mice out of gardens, homes and structures is prevention. That's why we created our all natural Rodent Stopper repellent. Our humane and safe Rodent Stopper can be used indoors or out as it creates a sensory barrier that works by smell, taste and feel. Apply Rodent Stopper every 30 days, regardless of weather or water. Pleasant to use as it dries clear and odor free, our liquid Rodent Stopper is an excellent first line of defense against rats and mice.