Patented, revolutionary, X-strength GEL quickly and easily removes even the crustiest of stains, deposits and build-up. Leaves a water-repellant shield. GEL formula has proven more effective than the competitive products. Made of an organic salt, it is safer and easier to use than traditional acid cleaners. Organic salt: 10 times stronger than vinegar. Safe for use on: Glass, Plastic & Acrylics, Chrome, Aluminum, Fiberglass, Tile, Stainless Steel, Brass, Copper, Painted Surfaces and Enamel Finishes. Removes: Encrusted Calcium/Lime, Heavy Green Tarnish, Heavy Oxidation, Rust, Corrosion, Oil, Water Stains, Soap Scum Build-Up. Not Suitable for: Marble, some Granite, Jura, Travertine, & Terrazzo.