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

Professional Grade Central Heating Protection The Sentinel Leak Sealer 1L is a high-performance internal leak sealer designed to protect your home from the damage and inconvenience of central heating leaks. Specifically formulated for both professional plumbing engineers and DIY enthusiasts, this liquid solution targets small, "invisible" leaks and weeping joints that are often impossible to locate manually. By sealing these gaps from the inside, it helps stabilize your system and stops the frustration of a constant boiler pressure drop. Safe and Non-Clogging Technology Unlike lower-quality alternatives that can cause catastrophic blockages, Sentinel’s advanced formula is non-clogging. It circulates freely with the system water, forming a soft seal only when it comes into contact with the air at a leak site. This ensures that your radiators, valves, and expensive central heating pumps remain completely safe and operational while the leak is being addressed, often resulting in a quieter system. Universal Compatibility Sentinel Internal Leak Sealer is compatible with all metals commonly found in UK heating systems, including steel, copper, and aluminium. It is also safe for use with all common elastomers used in seals and gaskets. For the best results, it can be used alongside a central heating inhibitor to provide long-term protection against both leaks and internal corrosion. Application Made Simple There is no need for complex draining or expensive plumber call-outs. Simply add the solution to your system via the expansion tank on open systems or using a dosing vessel on sealed systems. One bottle is sufficient to treat a standard domestic system of up to 10 radiators. Within 24 hours of circulation, the formula will form a reliable seal, helping you avoid repair bills and ensuring your heating system remains at peak efficiency.