LavaTap - Sentinel Internal Leak Sealer 1L - High Performance Central Heating Leak Sealer for Boiler Pressure Drop, Radiator Leak Repair, Weeping Joint Fix and Heating System Water Treatment

Central heating leak sealer: targets and seals minor pinhole leaks and weeping joints effectively within all types of indirect central heating systems to prevent water damage Boiler pressure drop fix: restores system stability by addressing the "phantom" pressure loss in combination boilers and sealed systems that causes frequent emergency shut-offs Internal leak sealer technology: forms a durable yet soft polymer seal normally within 24 hours without causing permanent blockages in radiators, valves, or internal components Safe non-clogging formula: circulates freely throughout the pipework and is specifically designed to be safe for high-value components such as central heating pumps and air vents Universal metal compatibility: suitable for use with all common system metals including copper and steel and is fully compatible with aluminium and synthetic elastomers High capacity treatment: one 1 litre bottle provides sufficient active solution to treat a typical domestic heating system of up to 10 radiators or 100 litres of water