Adey is 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. It can be dosed into the system through the MagnaClean filter for optimum use.

• High performance leak sealer
• Seals small inaccessible leaks and weeping joints
• Reduces pressure loss on sealed systems
• Avoids costly maintenance repairs
• Reduction in blocked pumps, air vents or valves
• Suitable for all heating systems
• Available in 300 ml Rapide canister