GS Restroom & Bowl Cleaner Concentrate is non-corrosive and free of harmful acids. It will clean toilet bowls, urinals, tile walls, tubs, and sinks with ease and safety. When diluted properly, GS Restroom & Bowl Cleaner Concentrate will break down and remove daily accumulations of soils, limescale, and urinary salts with its high-foaming action. Fresh clean fragrance. Costs just 58 cents per quart of diluted product.