Krud Kutter Calcium, Lime and Rust Stain Remover

Efficiently dissolves and removes tough calcium and lime deposits as well as rust stains from the surface of showers, sinks, glass, tubs, toilets, coffee machines, and kettles • Great to use outdoors on concrete driveways, wooden decks, stone, masonry, siding, brick, and stucco • Will not harm lawn or plants when used as directed • Do not apply to paint, stains or brick that contain iron oxide pigments • Safe for septic systems • Biodegradable