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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 and 10L

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Technical specifications

Physical and chemical properties

Environmental credentials

  • Appearance: ​​Viscous liquid
  • Colour: White/off-white
  • Odour: Slight
  • Solubility: Dispersible in water
  • pH (concentrated solution): 7.0
  • Relative Density: 1.06 g/cm³
  • Non-hazardous
  • Non-toxic
  • Biodegradable 

Quality

  • ISO 9001 & ISO 14001

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Dosage instructions

How to use

A 500ml bottle will provide effective treatment for a typical 100litre/ten radiator system. For larger systems, use further MC4 as required. To introduce MC4 to the system, we recommend using the MagnaClean® canister to dose the system. No preparation is required, and you can use your heating as normal after dosing.

Alternatively, dose via a radiator or the F&E tank. For long-term system protection, use MC4 Leak Sealer in conjunction with ADEY’s MC1 Protector. Do not use in single feed indirect cylinders.

Technical
Data Sheet

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Safety
Data Sheet

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Homeowner benefits

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

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Also available in Rapide

MC4+ Rapide isn’t just powerful – it’s fast too. The high concentration guarantees a strong seal. Because it flows around the entire system, it gets to work even in tough-to-reach places. And with its quick-dose bottle design, 20 seconds is all it takes to add it to the system.

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MC4® Leak Sealer

Our 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.

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Helpful Tools

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