Homeowner benefits

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

Technical specifications

Physical and chemical properties

Environmental credentials

  • A​​ppearance: ​Viscous emulsion
  • Colour: White/Off-white
  • Odour: Slight
  • Solubility: Dispersible in water
  • pH (concentrated solution): 7.0
  • Relative Density: 1000 kg/cm³
  • Non-hazardous
  • Non-toxic
  • Biodegradable 

Quality

  • ISO 9001 & ISO 14001

Dosage instructions

Maintain peak performance

A 500ml bottle will provide effective treatment for a typical 100-litre/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. 

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. 

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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
  • Subject to availability in certain countries

MC4+® 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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