Taski Sani Acid is a concentrated Phosphoric acid based limescale remover manufactured by Diversey that contains a corrosion inhibitor. Sani Acid periodic washroom cleaner quickly removes calcium, limescale and urine deposits as well as rust stains from acid resistant surfaces. Phosphoric acid based cleaners such as Taski Sani Acid Heavy Duty Descaler efficiently remove heavy residue whilst still being gentle to the surfaces to be descaled.