engine head gasket sealer

What Is the Best Head Gasket Sealer?

what is the best head gasket sealer ? This is a question many people who drive old cars have asked themselves or their mechanic at least once.

Have you noticed a mayonnaise like substance inside the oil filler cup, white or blue smoke from the exhaust or many flat spots while driving? If your answer is yes, your dear old car could be suffering from a head gasket failure.

Buying a new engine or replacing the head gasket would be a more permanent solution to a head gasket failure but expensive and time consuming.

The best head gasket sealer is a faster and more affordable solution that will enable your car to continue working as you sort yourself out financially.


Best Head Gasket Sealer



1.  Bar’s Leak HG-1 HEAD SEAL Blown Head Gasket Repair


If your car has been losing antifreeze at an alarming rate, Bar’s Leak HG-1 HEAD SEAL will provide a semi-permanent solution so your engine won’t overheat or burn out.


what is the best head gasket sealer


Bar’s Leak HG-1 HEAD SEAL repairs blown head gasket and permanently seals cylinder heads and blocks that could be cracked.

While repairing the gasket will take a few days in the garage, this seal only takes 15 minutes downtime to dry up and you are free to go with your car.

It’s completely compatible with antifreeze so you will not have to flush your coolant before the repair.

What makes this seal; the best gasket sealer is that it’s compatible with all gas, diesel and turbocharged engines unlike most of its competitors.

 Though this is not a permanent solution, troubles of core plugs, radiator leaks and heater core will be solved at least for a while.

Bar’s Leak HG-1 HEAD SEAL flows smoothly down the cooling system and seals any cracks and gaps without clogging your system.


It does not transfer heat as fast as antifreeze so your engine will run a little warmer than usual and the heater won’t be as hot.

2.  BlueDevil Head Gasket Sealer – 32 ounce.

Apart from the fact that BlueDevil Head Gasket Sealer only works on 4 and 6 cylinder engines, it does in fact give the best head gasket repair of all time.

best head gasket sealer



 This sealer is very reputable among do it yourself drivers and mechanics because it’s easy to use since all you have to do is pour it onto the radiator while the engine is on idle mode.

Unlike most sealers that seal the gasket head for a few weeks or months, this BlueDevil will give you a full year service or more depending on how well you take care of the car.

 It requires a one hour idle time with the engine idle to work well and you don’t have to empty the radiator or remove the thermostat.

Anyone who knows anything about a car can be able to use this product to cure the overheating and losing coolant excessively.

 It flows easily down the radiator locating any leaks to seal it and it is compatible with antifreeze.


You have to follow the instructions on the bottle to the letter otherwise it might not work.

3.  Steel Seal Blown Head Gasket Fix Repair Sealer – 6 Cylinder.

The thing about really old cars is that they are expensive to repair if you can find spare parts and they are not worth the cost.

When your cars head gasket blows or starts to leak, this Steel Seal Blown Head Gasket Fix is your best friend instead of a repair worth two grand or so.

engine head gasket sealer


This head gasket sealer is a permanent solution to any leaks and gaps in the head gasket or cylinder as long as you follow the instructions carefully.

 It’s an easy solution that will give you more days with your sentimental car and even let you pass a mechanical test.

Steel Seal Blown Head Gasket Fix comes with the assurance of many repair shops all over the nation, 100 % money back guarantee if it doesn’t work and a very appealing lifetime guarantee.

 Once you pour the sealant to your radiator, you have to let it sit for an hour on idle engine mode before moving the car.


It’s only recommended for 6 cylinder engines and the instructions are very strict.

4.  Bar’s Leaks 1111 Head Gasket Fix – 24 oz.

If you are wondering; what is the best head gasket sealer ? Bar’s Leaks is the brand name you want to go for when it comes to sealing head gasket and cylinder gaps and leaks.

Bar’s Leaks 1111 Head Gasket Fix is formulated to effectively flow down the cooling system and identify any leaks and seal all of them.

Bar’s Leaks 1111 Head Gasket Fix – 24 oz


Bar’s Leaks 1111 Head Gasket Fix contains gasket sealing particles and sealing liquid that penetrate through gaps easily and permanently seal them.

It is anti-freeze compatible so you don’t have to empty the radiator first or remove the thermostat.

If your car has started showing signs of blown head gasket, this sealant is easy to use at home or on the road before you get to a mechanic.

It is a 24 oz bottle that you will pour on the radiator and let the engine rest for a while to seal and dry the gaps.

With only 15 minutes down time you can repair your engine and get back to business in no time. Always have a bottle of this stuff on you since it’s cheap and effective.


It is not a permanent fix and it limits the performance of your car heater but it’s great.

5.  BlueDevil Pour-N-Go Head Gasket Sealer – 16 Ounce.

BlueDevil Pour-N-Go Head Gasket Sealer is the same product as the above BlueDevil but it’s a smaller bottle meant for people who want a one-time fix.


 The 16 ounces bottle is enough for a quick fix because you pour all of it on to the radiator and leave the engine on idle mode for an hour or so.

What is most impressive about this head gasket sealant is that it will give you a good service of up to one year if you do it correctly which is enough time to either sell the car or repair it permanently.

BlueDevil Pour-N-Go Head Gasket Sealer – 16 Ounce is a great semi-permanent solution to a blown head gasket and leaking cylinder so your engine can stop losing coolant and overheating.

This product is easy to apply and you can even do it yourself if the mechanic is not near. It is compatible with antifreeze and that will save you the hassle of having to empty the radiator first.

If you have a 4 or 6 capacity engine and you are asking yourself; what is the best head gasket sealer? Always go for BlueDevil gasket sealer.


It’s recommended mostly for 4 and 6 cylinder engines only and it’s not compatible with rare engine brands.

 What Is The Best Head Gasket Sealer Buying Guide?

So, what is the best head gasket sealer …and what should you look for?

From the above Bar’s Leaks and blue devil head gasket sealer reviews, it’s clear that these two brands are the most recommended by mechanics and auto shops everywhere.

 In rare event will you find that your locality doesn’t have these brands, here is what you should look for in a head gasket sealant;

  • Type of Engine:

Not all sealants work on all types of engines so you have to know what engine type your car is.

Bar’s Leak gasket sealer is usually the best because it serves most engine types but there are other brands out there formulated for each engine.

  • Compatibility:

Besides being compatible with certain engine types, the engine head gasket sealer must be compatible with that particular vehicle.

Some sealants work for specific vehicles and not on all so you have to be sure before buying.

  • Downtime:

How long does the sealant take to work and what do you have to do to the engine in the meantime?

if you are a person who can’t wait an hour or more because of impatience or an emergency, it’s wise to choose a sealant that works fast such as the Bar’s Leaks only 15 minutes.

However, if you can follow instructions to the letter and wait patiently for the sealant to dry, this will be better for your car because these kinds of sealants tend to serve you longer.

  • Compatibility With Antifreeze:

This is a big factor to consider because the sealant must come into contact with your coolant of choice.

A sealant that is not compatible with antifreeze will force you to empty the radiator before applying the fix and this is a lot of time and energy not to mention waste.

If you want to save time, choose a product that’s compatible with antifreeze and other products.

  • How Long Will It Last?

From the day you apply the sealant, a good product should give you a good year’s worth of service without any leaks and overheating.

Anything that goes for a month or two should not even be considered.


What is the best head gasket sealer? This is the question but more importantly, is this a good solution?

The answer is yes but only as a temporary solution because a leaking engine must be repaired and if possible replaced altogether to avoid more serious problems.