How to Repair a Leaking Cooling System with Miracle Seal

Repairing a cooling system leak can be difficult if you don’t have the right tools for the job. Thankfully, we know the perfect solution to help you repair small leaks in your cooling system. C-Tec’s Miracle Seal has gained an incredible reputation for itself as the ultimate coolant system leak repair sealant. It is a high-quality and powerful sealant designed to repair coolant leaks as fast as possible. Miracle Seal permanently seals small leaks and helps to prevent leaks from developing in the same areas in the future.


So, how can you use Miracle Seal to repair a leaking cooling system?


Locate the coolant leak


Many people are not sure where to start when attempting to repair a leaking cooling system. The answer is to find the leak first. This may prove difficult if the leak is not immediately obvious upon your initial observation. Locating the source of the leak is tricky because you may be dealing with a situation where the coolant has dripped and evaporated once it contacts the hot engine. The speed of this process makes it challenging to locate the coolant leak. It might also be difficult if the leak is internal. So, the first step in repairing a leaking cooling system is to find the leak and determine whether it is an internal or external leak.


Common causes of a leaking coolant system


If you’re having trouble locating the coolant system leak, it might help to be aware of some of the most common causes of a leaking coolant system. That way, you can begin checking off some possibilities until you find the source of the problem. One of the most common causes of a leak is corrosion. This can happen over time and worsen due to rust, which can create holes throughout the radiator system. Adding too much coolant can also cause a leak or failing to flush the system following a replacement of the radiator fluid. These are only a few common causes of a leaking coolant system though, but the good news is that Miracle Seal is more than capable of repairing such leaks.


Miracle Seal repairs leaks


Miracle Seal is a water-based suspension formula that consists of anti-corrosion and lubricating additives. This makes it the ideal formula for sealing coolant system leaks and doing so in a short amount of time. It can even seal small leaks and hair crack leaks that other sealants struggle with.


Here is a basic overview of how you can use Miracle Seal to repair a leak in a cooling system:


  1. Once you have located the source of the leak, flush out the old cooling system
  2. Then, with the heating switched on, open the heater valve
  3. Let the engine run until it is warm
  4. Grab your bottle of Miracle Seal and shake well before use
  5. Pour Miracle Seal into the radiator and let the engine run for at least five minutes
  6. Finally, top up the cooling fluid after the engine cools down


Miracle Seal is now available in IPG Member Stores – find your nearest IPG Member Store here:






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