Urine Gone Refill 48 oz (2 bottles of 24 oz) #1 Pet Urine Cleaner: stain & odor eliminator with fast-acting enzyme-based solution Enzyme based solution instantly penetrates into the fibers of a carpet, breaking down the urine and removing the stain from the carpet, padding, and floor Safe for carpet, wood & tile, bathrooms, sofas & beds, and litter boxes Safe for both pet or people accidents! Non-toxic