Updated at: 18-04-2022 - By: micdot

I haven’t seen anyone who wants to have a blown head gasket happen to them. When something doesn’t work the way it should, it can cause a lot of problems, such as engine misfires and oil leaks, which can be dangerous.

However, you have the option to change the whole head gasket or use a head gasket sealer.

Though it might be cheaper to use a head gasket sealer to fix the problem, this isn’t always the best choice.

In today’s post, we’ll talk about the pros and cons of head gasket sealers because there are a lot of different head gasket sealers on the market. This way, you can choose the best one for your car.

Will head gasket sealer ruin an engine? Can head gasket sealer damage the engine? How to use bars head gasket sealer, and the best head gasket sealer in 2021. So, with that in mind, let’s start this post.

Pros Of Head Gasket Sealer

Faster fix

Head gasket sealers are known to be able to quickly fix leaks on a blown head gasket and a leak on your car’s head gasket.

When you’re on a road trip and you can’t find any gas stations, what will you do?

Once you find yourself in a situation like this, you need ahead gasket sealer to help you fix the leak.

As soon as it is applied correctly, it will stop the leaks and keep your engine from squealing.

Quite cheap.

Even so, most high-quality head gasket sealers on the market aren’t very pricey at all. You can see how this is even more true if you compare the cost of replacing your head gasket to the cost of the new one,

Keep in mind that the brand of gasket sealer you buy can help you get a long-term solution to your head gasket problems.

Time is saved.

As you can see, sealing a head gasket doesn’t take long at all. When you put the sealer in your car radiator, the problem will be solved in about an hour.

Also, you can still use the head gasket sealer to fix the car’s heater core and freeze plugs, as well.

Cons of Head Gasket Sealer

A lot of things can go wrong.

There are times when the head gasket sealers don’t work well. The heat from your car can cause it to react with the oil and make powdery deposits that build up over time, so you should never pour it into your car. It can also be bad for the thermostat if you don’t know how to use the products.

Complications with each other

It sometimes doesn’t work because the head gasket sealers only work with certain engines. There are some sealers that are only for diesel cars. Keep in mind that if you use a product like this, the sealer’s effects may fade quickly or not at all in a short amount of time.

Best Head Gasket Sealer

It’s because of overheating, which is caused by a bad head gasket that makes people want to get sealers. The bars head gasket sealers help to fix this. This comes with refractory fibers and aramid, which make bulletproof vests strong and keep them from getting too hot or cold. Bar head gasket sealers like these are some of the best on the market right now.

K-Seal Coolant Leak Fix It’s easy to learn more about K-Seal here. I’ve written a detailed guide to everything you need to know about it and how to use it.

Will Head Gasket Sealer Ruin An Engine?


The answer is no! As long as you use the right head gasket sealer and then apply it the right way, you should be good to go This is because the particles of head gasket sealer are very small, so they don’t get in the way of your engine parts. However, make sure to use a head gasket sealer from a well-known brand.

Best head gasket sealer 2021

The Steel Seal Blown Head Gasket Fix Repair Sealer is what you need to get your car back together.

This makes it simple to use a sealer that works better for both diesel and gasoline engines. This product helps to solve problems with head gasket leaks.


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Easy to use.

It eliminates problems with overheating.

It makes your car run more efficiently.

It reduces the amount of smoke and the amount of oil used.

It’s better for old trucks that can’t hold water.


It can be pricey.

It only works better if you flush the engine first.

A more in-depth review of this product can be found in this other piece.

K-Seal HD ST5516

Here is another cheap sealant that can solve many common problems quickly, and it can be mixed with antifreeze. Using this product, you can get rid of tapping or flushing. It can also fix things like heater cores and freeze plugs, warped gaskets, cracked heads, and more.


It is a long-term way to fix coolant leaks.

It goes well with any antifreeze.

It doesn’t need to be flushed or drained.

It solves a lot of problems.

Quite cheap.


If your head gasket has a lot of damage, the sealant might not work as well for you.

It can sometimes change the color of some types of antifreeze.

This is another good head gasket sealer that meets ASTM standards. It permanently seals any blown head gasket and doesn’t let it come apart again. It’s simple to use and very safe.


It’s a long-term solution that works better in any weather.

: It makes sure there won’t be coolant leaks

It stops the loss of radiator fluids.

With cold starts and rough idles, this helps.


It might not work well with the thermostat after you use this product.

In this case, it can stop the tubes and passages in the cylinders and other parts of the machine.

How To Use Bars Head Gasket Sealer


First, make sure your car’s engine isn’t warm.

Make sure to take off the car’s radiator cap as soon as the engine is cold.

Make sure to shake the bottle of head gasket sealer.

Pour some head gasket sealer into the radiator to keep it from getting dirty.

Try to add coolant to the radiator to make sure it’s filled up enough.

Then, start the engine.

On your dashboard, there are climate control buttons that you can use. You can now set up the heat to the highest setting.

Take a look at your engine RPMs and make sure they stay at 1000 for at least 15 minutes.

You can now turn off your engine and let it cool down for at least an hour.

Can Head Gasket Sealer Damage The Engine?

The answer is no! As long as you use the right head gasket sealer and then apply it the right way, you should be good to go.

Because K-Seal or BlueDevil Head Gasket Sealer are my favorite, you will have leaks. They are both non-particulate sealing agents, which means they won’t hurt your engine but will stop leaks for good.


Today, there are a lot of head gasket sealers on the market. They say they are the best way to fix your blown head gaskets.

Then, in this write-up about the pros and cons of head gasket sealer, you get to choose what works best for your engine, too.