Fernox F4 Express Central Heating Leak Sealer 400ml Chemicals

The Fernox F4 Express Central Heating Leak Sealer resolves small, hard-to-reach leaks in central heating systems, preventing pressure loss and boiler failures. Upon dispersion, it forms a polymer to seal pinholes and works within 1-24 hours. It avoids blockages in boilers and critical components like pumps and safety devices. Using Barrier Pressure Pack technology, the non-flammable, compressed air propellant ensures safe application. Its quick, 30-second dosing process eliminates the need for a complete system drain down. It's non-toxic, environmentally friendly, and suitable for systems up to 130 litres, with 16 radiators or 250 sqm of underfloor heating. It can be dispensed via a radiator air vent, system filling loop, or TF1 Filter. If using a TF1 Filter, ensure it's emptied of contaminants first. Fernox F4 Express is a reliable, cost-effective heating system solution in a 400ml size.. Fernox F4 Express Central Heating Leak Sealer - 400ml Fernox Chemicals

Quick and convenient – doses in 30 seconds Simple to use with no mess Add via a radiator adapter or filling loop supplied Protects against corrosion and limescale Non-toxic, environmentally friendly formulation