This pleasantly scented toilet bowl cleaner contains 9 percent hydrochloric acid & detergents to quickly remove rust, scale, stains, hard water mineral deposits & urine salts. Acid Bowl Cleaner is ready to use in cleaning toilets & urinals. Liquid cleaner comes in a squeeze bottle with a flip top for easy dispensing. Allow this cleaner to remain for at least 10 minutes until all rust, scale & stains are loosened. Rinse by flushing.