Get the job done without harsh chemical fumes. Though 99% natural, it cuts right through rust, hard water stains and even stubborn mineral deposits. Angled spout makes it easy to hit those hard-to-reach spots under the rim. Safe for all septic systems. Application: Bowl Cleaner; Applicable Material: Ceramics; Enamel; Fiberglass; Metal; Plastic; Vinyl; Dirt Types: Grime; Mildew; Mold; Organic Matter; Soil; Stains; Scent: Unscented.