Kills 99.9% of bacteria and viruses when used as directed. Angled neck applicator targets hard-to-reach areas, including under the rim. Thick 9.5% hydrochloric acid formula coats above and below the waterline. Coating action provides longer contact to help dissolve tough rust stains, lime stains and mineral deposits. Specially formulated to destroy hard water stains. Application: Toilet & Urinal Cleaner; Applicable Material: Toilets; Urinals; Chemical Compound: Hydrochloric Acid; Dirt Types: Grime; Mildew; Mineral Scale; Mold; Organic Matter; Rust; Soil; Stains.