Tackle tough stains like soap scum, hard-water mineral scale, rust and more. Safe on a variety of surfaces ? use it on counters, sinks, tubs, tiles and shower doors. 99% naturally derived. Application: Tub/Tile/Shower/Grout Cleaner; Applicable Material: Ceramic; Fiberglass; Grout; Laminates; Plastic; Polished Metal; Sealed Stone; Vinyl; Dirt Types: Bacteria; Dust; Fungus; Germs; Grease; Grime; Mildew; Mineral Scale; Mold; Rust; Soap Scum; Soil; Scent: Unscented.