GEL FOR RUST, LIMESCALE REMOVAL TENZI "DERAST GEL" 1 L Removal of limescale, boiler scale, rust. Effective gel for removing rust, limescale, concrete, cement, boiler scale from acid-resistant surfaces; contains hydrochloric acid; do not use the concentrate on enameled, nickel and chrome surfaces; do not allow the surface covered with the working solution to dry out.
