HTH™ Borkler Gel is a double-action waterline cleaner that dissolves greasy deposits such as sun creams, and also removes lime scale deposits, restoring the shine to dull linings. The product is a gel formula that maximises effectiveness by clinging to vertical surfaces therby increasing contact time. The product is low foaming. It may be used on all types of swimming pool equipment. No abrasion is required. Scrubbing is only necessary on thick build-ups of old deposits.