MCXS® External Leak Sealant & Jointing Compound 
High performance, fast acting silicone paste for use as a leak sealant and jointing compound. 
• Suitable for compression and screw fittings 
• Retains flexibility once set 
• Ideal for most surfaces – wet or dry • Safe for use with drinking water 
• Fully WRAS approved 
How to use 
1. Ensure water pressure has been relieved prior to application and during setting. Drain system if necessary 
2. Clean and prepare surface before use for good adhesion 
3. Carefully apply MCXS from the tube 
4. Once applied the sealant can be moulded 
5. For sealing burst pipes, MCXS can be used with a binding bandage to aid repair 
6. Replace cap immediately after use 
7. Allow a minimum of 2 hours and up to 12 hours for MCXS to set. Curing time dependent on amount applied, and can be accelerated by spraying with water.
Application 
MC-XS may be used as a jointing compound on hot and cold water services, including potable water, in place of traditional materials. Reinforcement is generally not required, but reinforcement fibre may be used on larger pipe sizes. The use of reinforcement material is advisable for larger leaks and higher pressures. 
Environmental 
ADEY is a carbon neutral company and cares about the environment. The company’s award-winning product innovations contribute significantly to reduced carbon emissions, energy and water usage. 
MCXS is classified as non-hazardous and non-toxic.