This product cleans as it disinfects by killing viruses and bacteria when used as directed. The thick 9.5% hydrochloric acid formula packaged in an angle-neck bottle cleans above and below the water line, and will not harm plumbing or septic systems. Application: Toilet & Urinal Cleaner; Applicable Material: Toilets; Urinals; Chemical Compound: Hydrochloric Acid; Dirt Types: Grime; Mildew; Mineral Scale; Mold; Organic Matter; Soil; Stains.