Protect your heating system and prevent leaks with our leak sealer. This product is designed to seal small, internal and inaccessible radiator leaks along with weeping joints. Perfect for reducing overall pressure loss in your central heating system, it will not cause any blockages.The leak sealer will be effective within 24 hours depending on how serious the leak is whilst also being non-irritant and non-toxic. It's compatible with all radiator materials including aluminium and is quick and easy to use. Features:Prevents leaks and helps protect central heating systemsEasy to useNon-toxic and non-irritant formulaSafe on all materials found in heating systems (including aluminium)Will not cause blockages within the system