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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