A blown head gasket is an expensive repair. The head gasket sits between the head of the engine and the engine block. The head gasket itself is a cheap car part but it takes some skill to take out your engine head and replace the gasket. To avoid a head gasket replacement you can try to use any of the best head gasket sealers. 

Before we begin you should know that these are sealers and will fix blown head gaskets if the damage is not as bad. Using the best head gasket sealers can help you prevent expensive head gasket repairs and it is easy to do. All you need is to throw your best head gasket sealer of choice to the radiator and let the car idle for 30 minutes.

Tip: Make sure to have fresh coolant on your car. It will work better and there is no need to flush the head gasket sealer afterward. 

Now let’s take a look at the best head gasket sealers out there and which one to buy?

Best Head Gasket Sealers Reviews & Recommendations 2021

Best Overall: K-Seal


K-Seal is the best overall head gasket sealant. The K-Seal comes in at $18.99 and it is your go to solution for head gasket leak repairs. K-Seal mixes with all antifreezes and does not require a coolant flushing or draining before use. The formula used to make this product uses a type of nanotechnology, which involves microfibers that mesh to seal cracks and leakages. The product is easy to use and requires no special skills for you to use. This head gasket sealant will fix small leaks on your head gasket.

Pros of using this product are the ease of use, requiring no special skills to use this head gasket sealer. It will also work to fix other problems such as freeze plugs, cracked heads, and heater cores at a very affordable price.

Cons of using this product, the coolant will change color and it does not seal bigger blown areas.

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Premium Pick: Steel Seal Blown Head Gasket Fix Repair Sealer

Steel Seal Blown Head Gasket Fix Repair Sealer

The most premium head gasket sealant is Steel Seal. This head gasket repair kit will work well in both diesel and petrol engines. Steel Seal is the perfect solution for old trucks that can’t hold water in the radiator tank. This head gasket sealer is easy to use and will repair small head gaskets leaks from your car. Note: Flush your coolant prior to using this product. It’s gel-like and you’re going to want to possibly leave it in the system to help it seal better.

Pros of using this product are better engine temperature and improvement of oil consumption. Steel Seal also claims to reduce smoke emissions because of the increase in efficiency of the engine. Steel Seal works well and they offer 100% money back if the sealant does not work.

Cons of using this product include high price compared against similar brands. Moreover it is best recommended to flush the coolant before use, not everyone likes to get their hands dirty anyway.

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Honorable Mention: Bar’s Leaks 1111

Bar's Leaks 1111

The last product on our list is Bar’s Leaks. This is one of the best head gaskets sealants to use on your car or truck. It stops leaks from the head gasket or engine block. It contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps & cracks and harden to permanently stop leaks. The sealer is safe and easy to use.

Pros of using this product include easy use and a very quick time to seal the leaks. It will help prevent loss of coolant or water, produced by a US company. Professional grade product.

Cons of using this product include very thick sealant making it hard to pour in your radiator. Furthermore, this might clog up your engine heater core.

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Final Thoughts

To conclude using the best head gasket sealers is the best solution to expensive head gaskets replacement. If you are looking for something easy to use and budget-friendly K-Seal will be the perfect solution for you.

For a higher budget, you might consider Steel Seal as the best head gasket sealant used by many professional shops.

Next Article: Best Engine Degreaser: Top 3 In 2021!


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