The highly concentrated MC4 is an incredibly effective way to deal with small leaks. Protecting and sealing from the inside, it can infiltrate really hard to reach places, reducing the need for a more costly repair. One dose could be all it takes to fix the leak and restore pressure.

Homeowner Benefits:

• A simple way to seal small inaccessible leaks and weeping joints.
• Helps avoid costly maintenance repairs.

Installer Benefits:

• High performance leak sealer.
• Reduces pressure loss on sealed systems.
• No blocked pumps, valves or air vents.
• Suitable for all heating systems.
• Can be dosed through the MagnaClean® filter.
• Available in 500ml.
• Subject to availability in certain countries.