Aquacorr Descaler is an effective acid-based descaler for removing scale and deposits in central heating systems. It is designed to restore the efficiency of old heating systems with circulating water, eliminating deposits, biofilms and iron oxide deposits. The product is ideal for use in hard water areas and will work best in central heating systems. It is compatible with both water-based and glycol-based systems (after draining the system first). It should not be mixed directly with glycol.