This powerful gel is specially formulated to cling to smooth surfaces, where it actively dissolves hardwater limescale stains.  Gel Kilrock is ideal for bath-rim and water-drip stains and limescale build-up around taps, shower surrounds, tiles and shower heads.  It is perfectly safe on all ceramic and plastic sanitary ware.  Gel Kilrock is not a general cleaner, but a special descaler, and should be used on no more than about 5 sq cm at a time.