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Fernox F4 62422 Leak Sealer Express 400ml


– Quick and convenient – doses in 30 seconds
– Simple to use with no mess
– Added via a radiator adapter or filling loop supplied
– Non-toxic, environmentally friendly formulation
– Seeks out and seals most weeps and leaks

Only £16.99 Ex VAT
  • Summary

    The leak Sealer F4 is suitable to be used throughout a central heating system to seal small leaks and weeps which may cause pressure loss and boiler breakdown. Once dispersed within the system it will be effective 1-24 hours after application. The unique sealing efficiency of this proven product has been specifically developed to prevent blockages or restrictions within the boiler or vulnerable system components such as pumps and safety devices.

  • Specifications

    Colour: White
    Product Type: Leak Sealer
    Volume: 400ml
    Range: Express
    Manufacturer Website:

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