DO NOT USE on Kettles and Urns which have an EXPOSED HEATING ELEMENT.
Water that has a high content of calcium, limescale and iron oxide are referred to as ‘hard water’. Calcium, limescale and iron oxide are naturally occurring minerals in water. When water is heated, the mineral content leeches out and attaches itself to surfaces causing staining such as white marks or rusting. The regular use of CLR is an ideal solution to maintain a clean kettle or water urn, making sure that it is looking like new.