Fernox Central Heating Leak Sealer F4 Express 265ml-0

Fernox Central Heating Leak Sealer F4 Express 265ml


Fernox Central Heating Leak Sealer F4 Express 265ml 729136

4 in stock

SKU: 729136 Categories: ,


• Quick and convenient – doses in 30 seconds 
• Simple to use with no mess
• Added via a radiator adapter or filling loop on your heating system
• Non-toxic, environmentally friendly formulation 
• 100% recyclable can
• Seeks out and seals most weeps and leaks 
• Saves time and money on draining down and repairing 
• Does not cause blockages of pumps, air vents, etc. ts, etc.
• Compatible with all Fernox Protectors 
How to Use: 
   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. 
 For long term protection against corrosion and limescale we recommend systems are cleaned using Fernox Cleaner F5 Express and inhibited with Fernox Protector F1 Express. 
Application and Dosage: 
   One aerosol (265ml) will protect an average sized system (100 litres or up to ten single radiators) and is added via a radiator or filling loop. Fernox Leak Sealer F4 Express can be dispensed directly into a radiator air vent or system filling loop using the appropriate special adapter supplied with the product. The whole process takes less than two minutes.  
In single feed indirect cylinder, e.g. ‘Primatic’ or similar, potable water chemicals must be used.  

Additional information

Weight 0.5 kg