Sealing small and inaccessible leaks and weeping in central heating systems, Fernox F4 Express internal leak sealer helps to reduce the risk of pressure loss and boiler breakdown. Once dispersed the product cleverly seeks out oxygen ingress, forming a polymer formulated to seal the offending pinhole. Fast and simple, F4 can show results anywhere between one and 24 hours after application, helping to prevent blockages and restrictions in boilers, pumps and other components and safety devices and saving on inconvenient and costly complete system drain downs.

Fernox F4 central heating leak sealer 500ml (1)

Sealing small and inaccessible leaks and weeping in central heating systems, Fernox F4 Express internal leak sealer helps to reduce the risk of pressure loss and boiler breakdown. Once dispersed the product cleverly seeks out oxygen ingress, forming a polymer formulated to seal the offending pinhole. Fast and simple, F4 can show results anywhere between one and 24 hours after application, helping to prevent blockages and restrictions in boilers, pumps and other components and safety devices and saving on inconvenient and costly complete system drain downs. Using barrier pressure pack technology and compressed air propellent, this 400ml aerosol can is non-flammable. Because the propellent is not mixed with the active product it poses no risk of air ingress into the system, negating the risk of corrosion.

Fernox F4 Express F4 central heating leak sealer 400ml (1)

Deal effectively with small leaks using Adey MC4 500ml leak sealer. Easy to use, this sealer protects and seals from the inside, getting into the hardest to reach areas and saving your system from potentially costly repairs. In many cases one it takes only dose to fix a leak and restore full pressure.

Adey MC4 central heating leak sealer 500ml (1)

A fast, powerful solution for leaks and weeping joints, Adey MC4+ Rapide is a high concentration formula for a stronger seal. Added in just twenty seconds using the quick-dose bottle, MC4+ Rapide moves around the entire central heating system, working efficiently in even the hardest to reach areas.

Adey MC4+ Rapide MC4+ central heating leak sealer 300ml (1)

Looking for central heating leak sealer? Order from Wolseley today - free delivery or click and collect available nationwide.

Central Heating Leak Sealer