Fernox Leak Sealer F4 Express Aerosol 265ml - 58232
F4 Leak Sealer Express from Fernox is suitable for use throughout a heating system for sealing small weeps and inaccessible leaks. It works best when you have circulating hot or warm water in the system and it’s usually effective within 1 to 24 hours after use.
Safety devices, pumps and other similar parts will not be blocked while in use.
One 265ml can is suitable for approximately 10 single radiators or an average sized heating system and is added via a filling loop or a radiator.
Features and Benefits:
|Manufacturer Part Number||58232|
£17.33 (Inc. VAT)
RRP £31.03 Save 44%
Price Guaranteed For
Follow instructions carefully if using via radiator to avoid a mess on the floor. Make sure rad valves are closed before removing vent and that a valve is open after attaching tube and before injecting the product and closed again before removing the tube. Obvious but worth taking care. After about 4 weeks there is no pressure drop in the system at all. It took a few days to work but it seems to have fixed my problem.