Fernox F4 Super Concentrate Central Heating Leak Sealer 290ml

The 290ml Fernox F4 super concentrate central heating leak sealer is compatible with all Fernox corrosion protectors. Easily and quickly added via one of the radiators, it seeks out and seals most weeps and leaks without causing blockages of pumps, air vents, etc  saving time and money on draining down and repairs.

• Reduces pressure loss from sealed systems
• Ideal for pressurised systems and combination boilers
• Universal applicator included
• Patented application
• Non-toxic, environmentally friendly formulation