Cleans and disinfects. Kills 99.9% of viruses and bacteria when used as directed. Thick formula coats above and below the waterline. Coating action provides longer contact time to help dissolve tough rust stains, lime stains and mineral deposits on contact. Powers through hard water stains. Will not harm plumbing or septic systems. Angled neck for better reach under rim. For use on toilets and urinals.