Fernox F4 Express heating leak sealant, 400 ml aluminium can

• Also suitable for gas heaters and condensing boilers
• Inserted into the system and distributed in normal heating mode
• After entering and circulating, the agent normally seals the holes in a period of 1 to 24 hours
• As soon as oxygen, e.g. leaks into the system through a leak, the leak detector connects to the oxygen and permanently seals the leak
• Do not rinse
• For all types of heating system
• Seals small leaks, such as cracks, brittle gaskets, leaky solder joints, etc.
• Ideal for reducing the pressure loss of closed systems
• Causes no blockages of pumps or vents or narrow valves
• Can remain in the system
• Saves time and costs