The Waterless Urinal Oil (WUO) is a revolutionary oil sealant designed to trap nasty urinal smells in any kind of waterless urinal containing a cartridge. This oil sits on top of the water waste inside the cartridge creating a powerful seal. Any urine or water entering the urinal goes through the oil and sits below it to be then flushed away.The WUO contains powerful friendly bacteria which that digest the urine and any organic matter present inside the urinal cartridge such as uric salt, sludge and ammonia. This guarantees a system free of unpleasant smells and blockages.