MC4+ 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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Installer benefits
- Suitable for all heating systems
- High-performance leak sealer
- Reduces pressure loss on sealed systems
- No blocked pumps, valves or air vents
- Quick-dose bottle for speedier injection – takes as little as 20 seconds
- Versatile dosing options – via the radiator, air vent or boiler

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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Technical specifications
Physical and chemical properties
- Appearance: Viscous emulsion
- Colour: White/Off-white
- Odour: Slight
- Solubility: Dispersible in water
- pH (concentrated solution): 7.0
- Density: 1.00 g/cm³
Environmental credentials
- Non-hazardous
- Non-toxic
- Biodegradable
Quality
- ISO 9001 & ISO 14001
Dosage instructions
How to use
With its quick-dose bottle, MC4+ Rapide can be added in just 20 seconds
via a radiator, air vent or the boiler filling loop. However, we always
recommend dosing via a MagnaClean® filter.
Do not use in single feed indirect cylinders.
Homeowner benefits
- A simple way to seal small, inaccessible leaks and weeping joints
- Helps avoid costly maintenance repairs

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Learn more about our water treatment chemicals
ADEY Best Practice in liquid form
ADEY’s water treatment chemicals have been created from premium ingredients and mixed expertly together, the complete range is developed to an outstanding quality. With 9 formulas to choose from, you can clean and protect every system.

MC4+ 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.
Installer Benefits
- Suitable for all heating systems
- High-performance leak sealer
- Reduces pressure loss on sealed systems
- No blocked pumps, valves or air vents
- Quick-dose bottle for speedier injection – takes as little as 20 seconds
- Versatile dosing options – via the radiator, air vent or boiler
Sample text. Click to select the text box. Click again or double click to start editing the text.
Dosage Instructions
How to use
With its quick-dose bottle, MC4+ Rapide can be added in just 20 seconds
via a radiator, air vent or the boiler filling loop. However, we always
recommend dosing via a MagnaClean® filter.
Do not use in single feed indirect cylinders.
Sample text. Click to select the text box. Click again or double click to start editing the text.
Sample text. Click to select the text box. Click again or double click to start editing the text. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Technical Specifications
Physical and chemical properties
Environmental credentials
- Appearance: Viscous emulsion
- Colour: White/Off-white
- Odour: Slight
- Solubility: Dispersible in water
- pH (concentrated solution): 7.0
- Density: 1.00 g/cm³
- Non-hazardous
- Non-toxic
- Biodegradable
Quality
- ISO 9001 & ISO 14001
Homeowner Benefits
- A simple way to seal small inaccessible leaks and weeping joints
- Helps avoid costly maintenance repairs
Enter your postcode to find your nearest merchant.
Get straight to the products you need in a few clicks.


Find a Stockist
How to Videos
ADEY MC Chemicals
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ADEY Chief Technical Officer Neil Watson talks about our Queen's Award winning MC chemical range.
ADEY - The Complete Chemical Range
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Our water treatment chemicals have an incredible start in life; created from premium ingredients and mixed expertly together, the complete range is developed to an outstanding quality.

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