(Updated on October 24, 2019)
The car radiator is responsible for keeping your engine cool. When coolant fluid flows through the engine, it gets heated by all the hot moving components in there. At the same time, these engine components also get cooled down by the coolant. This prevents the engine from overheating. All this newly hot coolant fluid will flow away from the engine and into a radiator. Once it circulates through the radiator, the hot coolant will be cooled down and flow back into the engine. Then the process will start all over again.
You certainly don’t want to risk having an overheated engine because that could cause permanent damage to it. If coolant fluid were to ever start leaking out of your radiator, then your engine would be deprived of this precious coolant fluid. As a result, your engine’s components won’t get cooled down. This is how overheating occurs.
Top 10 Best CAR Radiator Stop Leak
The good news is there are products available which can help stop car radiator leaks. Since components like gaskets and seals tend to wear down as time goes on, there are certain formulated products which can work to strengthen these components. That way, they will not cause coolant to leak through them from the radiator.
Below are the top 10 best car radiator products for stopping leaks.
1) ATP AT-205 Re-Seal Stops Leaks
The ATP AT-205 Re-Seal Stops Leaks will work quickly to stop the leaks from your radiator. It rejuvenates many important components of your vehicle, such as your gaskets, rubber seals, hydraulic system, transmission, and power steering. You can use the ATP AT-205 with all types of oils, whether synthetic or standard. There is no petroleum distillate in this formula either, so your seals won’t break down like they would with other formulas.
2) Dike Temporary Radiator Stop Leak
The Dike Temporary Radiator Stop Leak is great for patching radiator leaks in a timely fashion. Any time you have radiator issues, it takes just a couple of seconds for them to go away with this formula. The gasket of your device will be sealed better than ever. The best part is that you won’t need to pay a lot either because the Dike Temporary Radiator product is priced affordably. The only downside is that you’ll need to use this product more often because it only works on a short-term basis.
3) Prestone AS145 Radiator Sealer Stop Leak
The Prestone AS145 Radiator Sealer Stop Leak helps make your cooling system more corrosion resistant. As you may know, radiators often leak because they’re smothered with corrosion. If you can keep corrosion away, it will stop and prevent leaks from happening in the future. Plus, all the seals of your cooling system will be strengthened and rejuvenated.
4) K-Seal ST5501 Multipurpose One Step Permanent Coolant
The K-Seal ST5501 Multipurpose One Step Permanent Coolant is one of the few products which provides a permanent solution to your radiator leak issues. You can easily apply the formula too by just shaking it in the bottle and then pouring it into the system. After that, it will patch up all the small cracks which are causing your leaks. You may even notice your vehicle performing better on the road as well.
5) Bar’s Leaks HDC Radiator Stop Leak
The Bar’s Leaks HDC Radiator Stop Leak will plug up holes in your radiator which leak water. Just add this formula to your coolant liquid and then watch as it works quickly to stop your radiator leaks. You will also have a reduction of corrosion and rust as well because of its corrosive resistant formula. The water pump seals will even be lubricated too. You can’t go wrong with this affordable product.
6) Bar’s Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak
The Bar’s Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak is formulated specifically for stopping large radiator leaks. If you’ve let cracks grow or get bigger in your system, then this product is one of the few formulas that can patch it all up. If you have a blown head gasket, this product can even repair that too.
7) J-B Weld DS-114 Perm-O-Seal Radiator Stop Leak
The J-B Weld DS-114 Perm-O-Seal Radiator Stop Leak is corrosion & rust resistant and does a good job of patching small cracks and leaks. There are no toxic ingredients used in this formula either. When you patch holes and cracks with this product, they will stay fixed for a long time. The only downside is that you cannot use this on larger cracks.
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8) Bar’s Leaks G12BP Powder Radiator Stop Leak
The Bar’s Leaks G12BP Powder Radiator Stop Leak is another great product for stopping leaks, corrosion, and rust from forming in your cooling system. It is easy-to-use and apply this product, so you don’t need to be an auto expert or anything like that. You will be very pleased with its performance. However, it is only a temporary fix to your leak problem. So be sure to get your vehicle to an auto mechanic when you have the money for a more professional repair.
9) Alumaseal ASBPI12 Radiator Stop Leak Powder Blister Card
The Alumaseal ASBPI12 Radiator Stop Leak Powder Blister Card is an affordable way to stop leaks and cracks. This product works well on all types of products, whether they’re made from rubber, metal, or plastic. It will work well with other coolants in your system without clogging it too. Again, only good for a short-term basis.
10) Bar’s Leaks 1186 Liquid Aluminum Stop Leak
The Bar’s Leaks 1186 Liquid Aluminum Stop Leak will give you a great performance by sealing leaks in your cooling system fast and affordably. Even though it is a temporary fix to a radiator leak problem, it will target your gaskets quickly to repair the cracks and damage.