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