HG professional limescale remover (Hagesan blue) is a highly concentrated cleaner for the removal of limescale and calcium deposits from: taps, bathtubs, toilets and shower walls and for the descaling of blocked showerheads. HG professional limescale remover (Hagesan blue) also removes rust, dirt, ‘yellow’ stains and verdigris. And HG professional limescale remover (Hagesan blue) is, of course, safe for use on virtually all surfaces in the bathroom and toilet, such as: chrome, stainless steel, ceramic, glazed and unglazed ceramic tiles, glass and plastic.