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Sometimes drivers have to deal with such a problem as the flow of the engine cooling system. If such a funny thing happened near the service station or near the house, then the emergency situation can be solved by sealing the crack. There are cases when such a nuisance occurred far from the city. Then there are only two solutions to the problem for the driver: calling a tow truck or using a special sealant for the engine cooling system. It is impossible to go further without eliminating the leakage, since this is guaranteed to lead to overheating of the vehicle's motor. The choice of sealants on the market is varied. Having no idea about their destination, it is very difficult to choose the product that suits you. In this article we will try to figure out how to choose the right sealant for the engine cooling system.
A malfunction in the cooling system may cause the engine to overheat.
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There are a number of filling materials for the engine cooling system that are able to cope with microcracks, small radiator holes and nozzles. In order to make the right choice, it is necessary to get acquainted with their characteristics. First of all, before buying, examine the chemical composition of the liquid you are going to buy.
There are powder and polymer filling means.
Powder consists of organic substances such as mustard or ginger root, as well as mineral fertilizers. The second type is based on metallic polymers.
Let's try to figure out which sealant is better to prefer.
Powder sealing materials do a very good job with radiator leaks, but can contribute to the buildup of plaque in the pipes. This contributes to overheating of the engine and the deterioration of the car stove.
Polymer products when released into the radiator are deposited on the microcrack, creating a patch. As soon as the coolant stops flowing, the rest of the sealing material is dissolved in the antifreeze. It does not form a raid on the details.
As you can see, a more correct and reasonable solution would be to purchase a polymer based product.
Polymer Sealant Selection Parameters
Polymer filling materials have many varieties. To make the right choice, you need to decide on the purpose of its application.
There are products that are used regularly by motorists at every flushing of the radiator and nozzles in order to prevent the appearance of corrosion. In this case, you need to purchase a special flushing sealing material. Of these fluids, Lavr and Bizol cooling sealants have proven themselves well during independent tests. They are used when the radiator and nozzles need capital flushing. High-grade additives present in their composition, help to cope even with very old deposits, eliminate the remnants of scale, fat, corrosion products.
Car cooling system diagram
If you get a sealant in case of an emergency situation on the road, radiator holes or the appearance of an unexpected leak, then you need to pay more attention to these characteristics of the product:
- The size of the microcracks it can cope with;
- Crack elimination time;
- The percentage of sediment.
Breakdown on the road requires quick and high-quality repairs. The faster the sealant will act, the less coolant will escape from the system, which will protect your motor from overheating. As for the size of microcracks, the majority of filling materials successfully cope with cracks up to 1 millimeter. There are liquids that can eliminate microcracks up to 2 millimeters. The most popular and effective, according to experts, are BBF and Liqui Moly. Tests have shown that they eliminate cracks with a diameter of up to 0.5 millimeters in one minute. Larger - in three minutes. Such patches are enough for about 100 kilometers, which allows you to get to the nearest service center or service station. And also Hi-Gear is a very good repair tool. It is effective for removing large microcracks, although it will take more time than previous remedies.
Particular attention when buying a product should be paid to such a parameter as the percentage of sediment. Some polymer liquids do not completely dissolve in antifreeze, the rest of the particles is deposited on the inner walls of the parts. Therefore, the smaller the percentage of deposits, the better for the radiator and pipes. According to the results of independent tests, BBF products have the lowest percentage of sediments.
Before you buy, carefully read the instructions for use. There are sealants that are used only after completely draining the coolant. If the situation happened on the road, then it is not always convenient. Therefore, it is better to choose a product that can be added directly to the radiator without first draining the antifreeze.
Some tips
For the engine cooling system to serve you for a long time and reliably, do not forget about the elementary rules: keep the radiator and nozzles clean, regularly carry out preventive flushing of the cooling systems.
In case of leakage, use only quality sealants for troubleshooting. Choose only polymeric filling agents. The right choice of sealant 
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And even if you used very high quality products, you only rendered “first aid” to your car. Do not postpone "tomorrow" trip to the service center. Only specialists will be able to properly resolve the problem by sealing the radiator or replacing it completely.
