Selden ACT Original is specially formulated for the removal and daily prevention on limescale deposits on toilets and urinals. Contains thickeners to increase the dwell time on surfaces allowing the chemical to work for longer to break down hard water scale, uric salts and other stubborn organic dirt. Can also be used on other surfaces in the washroom such as ceramics tiles. Stainless steel safe. Available in 1L with an angled spout or 5L bulk container.