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Fernox F4 express leak sealer 265ml

Product Code: 608234

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Product Description

Fernox Leak Sealer F4 Express is used in domestic heating systems for sealing small inaccessible leaks. Leak Sealer F4 Express works best in warm/hot circulating water. Once dispersed evenly in the system water it is effective within 1 - 24 hours. The sealing efficiency of Leak Sealer F4 Express has been formulated to prevent blockage of safety devices, pumps, etc

Product Features

  • Internal leak sealer
  • Ideal for reducing pressure loss in 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