FER-62422 | Leak Sealer F4 Express (aerosol) 400ml Type:Leak Sealer further safeguarding system components and

further safeguarding system components and providing peace of mind to both professionals and homeowners alike

This prepares the system for the addition of an inhibitor

Extra Strength Remover is a strong acidic cleaner for the removal of stubborn cement and grout residues

and other disturbing sounds

FER-62422 | Leak Sealer F4 Express (aerosol) 400ml Type:Leak Sealer further safeguarding system components andEasy application method: Fernox F4 Leak Sealer Express 400ml is designed for a quick, simple, and hassle free application. With its unique pressurized canister, it can be directly introduced into a heating system without the need for draining or disassembly, saving time and effort. Seals small leaks effectively: This product is specifically formulated to seal small, inaccessible leaks and weeps which can cause pressure loss in your central heating