Fernox F4 Express Leak Sealer 265ml 58232
Fernox F4 Express Leak Sealer 265ml 58232
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The F4 Express 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.
  • Quick and convenient - dosing can be done in approximately 30 seconds
  • Added via a radiator adaptor or filling loop
  • 100% recyclable can
  • Saves time and money on draining down and repairing
  • Compatible with all Fernox Protectors
  • Simple to use with no mess
  • Non-toxic, environmentally friendly formulation
  • Seeks out and seals most weeps and leaks
  • Does not cause blockages of pumps, air vents, etc

Technical specification

Width65 mmTypeLeak SealersSize265 mlLength68 mmHeight210 mmDepth45 mmColourWhiteManufacturer Model No58232Brand NameFernox


Fernox F4 Express Leak Sealer 265ml 58232



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