Fernox F4 Leak Sealer 500ml – For Central Heating & Underfloor Systems, Pipework Seal

Got a slow leak in your central heating or underfloor system?

This Fernox F4 Leak Sealer is a lifesaver.

It's a 500ml liquid that works to seal small leaks in pipework, radiators, and boilers without draining the whole system.

Just add it in, and it circulates to find and seal the leak.

It's made in the UK and eco-friendly.

Works with metal tanks and boilers, and is rated A+++ for energy efficiency.

Whether you're a homeowner tired of topping up pressure or a pro looking for a quick fix, this is the stuff.