Acid-based descaler for the cleaning and maintenance of toilet cisterns, formulated to remove limescale, mineral residues and deposits that impair the functioning of internal mechanisms. Suitable for domestic, commercial and professional use to restore the efficiency of toilet cisterns. Turn off the water supply and pour approximately 500 ml of the product into the cistern. Leave to work for about 10 minutes to dissolve the limescale deposits on the internal components. Flush the toilet to empty the cistern and turn the water supply back on to refill it. Flush again to remove any remaining residue.