Fernox F4 Leak Sealer 500ml - 56603

£28.56 (Inc. VAT)

53 In Stock




Fernox F4 Leak Sealer - 500ml

Fernox Leak Sealer F4 is used throughout domestic heating systems for sealing small inaccessible leaks. Leak Sealer F4 works best in warm/hot circulating water and once evenly dispersed will usually be effective within 1 - 24 hours.

The sealing efficiency of Leak Sealer F4 has been intentionally limited to prevent blockage of safety devices, pumps, etc.

For long term protection against corrosion the system should also be treated with a Fernox Protector.

  • Ideal for reducing pressure loss from sealed systems
  • Seals most weeps and small inaccessible leaks
  • Saves time and money on draining down and repairing
  • Does not cause blockages of pump, air vents etc.
  • Compatible with all metals and materials commonly used in central heating systems

Picking the correct kind of Central Heating Treatment is an important decision. After you decide that Leak Sealer provide the appropriate answer then the Fernox F4 Leak Sealer 500ml - 56603 is unquestionably worth your consideration.


Fernox F4 Leak Sealer 500ml - 56603 Specifications
EAN 5014551566033
MPN 56603
Product Code 101851
Type Central Heating Treatment
Sub Type Central Heating Leak Sealer
Warranty (Years) 1
Capacity (Litres) 0.5
Range F4

Fernox F4 Leak Sealer 500ml - 56603


£28.56 (Inc. VAT)

Stock status: 53 In Stock

Check Delivery Availability

This product is delivered directly by the manufacturer, to confirm they can deliver to your address enter your postcode below.

30 Day Returns

Returns Policy - Changed Your Mind?

If you change your mind about the product when you receive it you can notify us any time within 30 days and return it for a full refund at your own cost. Any refunds will be made within 30 days of receiving your returned item. You are expected to cover the cost to return the item and your initial delivery charge will not be refunded.

More details here

Often bought with

Similar products

This option is not available with the other selected options. Click OK to clear previous selections.