FERNOX 58232 LEAK SEALER F4 EXPRESS (265ML)

  • Our Part No: 3500012
  • MPN: 58232

We're sorry but this product has now been discontinued by Ferroli Boiler Spares and can no longer be purchased.

No known replacement is available.

Why Choose DHS?

  • Browse more products from
    Ferroli Boiler Spares

  • Secure Express Checkout
    with a selection of payment options

  • 12 Month Warranty
    On all parts

  • The UK's #1 Heating Spares Supplier
    94% Rated Excellent/Good

FERNOX 58232 LEAK SEALER F4 EXPRESS (265ML).

The Fernox F4 Express Leak Sealer is ideal for small leaks and weeps which may be causing pressure loss and boiler breakdowns. The F4 sealer is designed to prevent blockages or restrictions within the boiler and other vulnerable systems, such as pumps and safety devices.

  • Quick and convenient
  • Simple to use with no mess
  • Added via radiator adapter or filling loop supplied
  • Non-toxic formulation
  • 100% recyclable can
  • Seals leaks in inaccessible places
  • Compatible with all Fernox products

The Fernox F4 also available in a 500ml Leak Sealer Bottle.


The FERNOX 58232 LEAK SEALER F4 EXPRESS (265ML) is a genuine, brand new Ferroli Boiler Spares product, covered by a Ferroli Boiler Spares manufacturer's guarantee.

Not what you're looking for? Try our unique Spares Finder tool or you can view all Ferroli Boiler Spares products.

For advice on this or any product, please call us on 0330 123 3707, email us at web@dhsspares.co.uk, or see additional ways to contact us here.

At DHS we offer a range of product options to suit different budgets and requirements, while maintaining quality and reliability across all categories.

Below is an explanation of each product type available on our website. Please note that not all products will have all options available.

Unbranded Part

BEST VALUE

Unbranded Component Product. Genuine manufacturer component, but no branded packaging.

  • Sourced Directly from the Manufacturer
  • Supplied in Unbranded Packaging
  • Same Quality & Function as OEM Version
  • Cost Effective Alternative
  • 12 Month Warranty

Branded Part

ORIGINAL PART

Original Equipment Manufacturer Component with branded packaging.

  • Genuine Original Part
  • Sourced Directly from the Manufacturer
  • Manufacturers Official Packaging
  • Trusted Manufacturer Quality
  • 12 Month Warranty

Alternative Part

Compatible replacement parts sourced from a third party Manufacturer.

  • Lower Cost Replacement Option
  • Fully Functional Alternative
  • Appearance, design or materials may differ from the original part
  • 12 Month Warranty

Refurbished Part

Original OEM components that have been professionally refurbished.

  • Genuine OEM Component Professionally Refurbished and Tested
  • Environmentally Conscious Choice
  • Excellent Value for Money
  • 12 Month Warranty

Need Help Choosing?

If you are unsure of which product category is right for your repair or installation, our team is happy to help.

Contact us for expert advice on compatibility, pricing and availability.

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