How does the Fernox Leak Sealer F4 work?

Part of Fernox’s product portfolio is the Fernox Leak Sealer F4, a highly-effective internal leak sealer that solves system pressure loss issues.

It works by seeking out small inaccessible internal micro leaks and weeps, and then forming a polymer to seal the leak.

This video takes a look at how the Fernox Leak Sealer F4 solves central heating system pressure loss issues that are caused by micro leaks:

Fernox Leak Sealer F4 does not cause any blockages or restrictions within the boiler or vulnerable system components such as heat exchangers or pumps. A non-toxic, concentrated formulation, it can be left permanently within the system and starts to work within 1-24 hours after application.

Leak Sealer F4 is available in different applications – liquid and aerosol – depending upon installer preference, which both treat a 100 litre system or up to 10 single radiators. The 500ml liquid version only requires minimal draining of the system, whilst Fernox Leak Sealer F4 Express can be added via a radiator or filling loop in just 30 seconds, with no mess or fuss and no need to drain down the system.

Fernox Leak Sealer F4 is a simple to use, cost-effective solution that will save vital time on-site by avoiding a complete system drain down to undertake repairs of minor leaks.                

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