Effective specialist products for the toughest cleaning tasks.HG Limescale Remover 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. along with rust, dirt, yellow stains and verdigris. HG 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.