Head Gasket Sealant
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BlueDevil Head Gasket Sealant

Part No. 38386 Warranty Details  

Fit of this part varies by vehicle & equipment specs Type of Fit

BlueDevil Head Gasket Sealant will repair and seal leaks in Blown Head Gaskets, Warped or Cracked Heads, Heater Cores and Freeze Plugs. BlueDevil contains no solid or particulate matter and will not clog or harm your engine. It bonds to metal, aluminum, cast, alloy or plastic. BlueDevil is safe, easy to use and compatible in gasoline & diesel engines.

Product Features:
  • Permanent repair, Guaranteed!
  • Contains no solid or particulate matter that can harm a engine
  • Alternative solution for costly and time consuming repair
  • Safe and easy to use
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Antifreeze Compatible:Yes
Container Size:32 OZ
Container Type:PLASTIC BOTTLE
Count:1
Dosage:1 BOTTLE TREATS A 4.5 GALLON SYSTEM
Heater Core Leaks:Yes
Lubricates Water Pump Seals:No
Permanent Repair:Yes
Type:SODIUM SILICATE

REVIEW SNAPSHOT®

by PowerReviews
BlueDevilHead Gasket Sealant
 
3.6

(based on 82 reviews)

Ratings Distribution

  • 5 Stars

     

    (43)

  • 4 Stars

     

    (9)

  • 3 Stars

     

    (6)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (23)

69%

of respondents would recommend this to a friend.

Pros

  • Easy to use (39)
  • Reliable (24)
  • Can withstand use (12)
  • Compact (7)

Cons

  • Difficult to use (4)
  • Flimsy (4)

Best Uses

  • Home garage (42)
  • Automotive repair shop (18)
  • Roadside repairs (6)
  • Upkeep (4)
    • Reviewer Profile:
    • Casual driver (8), Auto enthusiast (6), Mechanic (5)
    • Was this a gift?:
    • No (4)
    • Reviewer Profile:
    • Casual driver (19), Auto enthusiast (18), Mechanic (15), Competitive driver (5), Truck enthusiast (5)

Most Liked Positive Review

 

It Flat Works!

OK, so I thought I would weigh in on this as I always appreciate honest feed back from other end users. I'm currently driving an "02 Dodge Caravan with the 3.3...Read complete review

OK, so I thought I would weigh in on this as I always appreciate honest feed back from other end users. I'm currently driving an "02 Dodge Caravan with the 3.3 Liter V-6. It was purchased used with 158k on the clock, and from the time I started driving it in mid February I noticed that the heat in the cabin would come and go – mostly go. It was chilly. The temperature gauge would also swing wildly between normal operating temperature, then all the way up to hot, then back down again (though I never overheated it). The next thing I noticed was that when I would park it in the garage, it would puke coolant on the floor (bubbling out of the overflow catch-can). Our mechanic did a C02 / coolant test and said there was no doubt that I had either a leaking head gasket or a cracked head. The cost of the estimated repair was between $1100 and $1500 depending on what had to be done and whether a new or used head was available. I started looking on-line for alternatives and stumbled on the customer reviews of this product. While there were just a precious few negative reviews, most were overwhelmingly positive, and the thing that struck me most were a couple people who failed on the first attempt because they realized they didn't follow instructions, but tried again and it worked on the second try. I did have to swallow hard at the price of about [$] per quart, but compared to the previously mentioned estimate, it started to look like a possible bargain, so I thought "Why not?"The instructions look deceptively simple. But when they say the engine must be cold, they mean ice cold as in "first start-up of the day". I started out on Saturday morning by removing the thermostat, draining and flushing the system, then I let it sit all day to cool. It was a mild, sunny day about 60 degrees and by about 4:30 in the afternoon the engine felt cool to the touch. Being the ADD, instant gratification fool that I am, I decided to start the process of running the vehicle with the prescribed amount (half the bottle) of Blue Devil in the coolant. While the instructions call for idling for at least 50 minutes, most of the successful reviews said to allow for at least two hours. I realized immediately that I had screwed up as the heater began to produce some heat almost immediately. It wasn't cool enough! To make matters worse, I had not glued the thermostat in place on it's housing, and it slipped down between the housing and the block when I had bolted it in it's vertical position. My precious coolant / Blue Devil elixir was leaking on the driveway - Doah!! Nothing to do but let it cool overnight and reload for Sunday.With a little more focus and determination, I started Sunday on a mission. I first dumped all the coolant, removed and cleaned the thermostat hosing and block surface, then glued the thermostat into position on its housing with a thin bead of silicone seal. Using some twine, I tied this assembly into a horizontal position so it wouldn't move before it set up. After about two hours, I bolted the thermostat back in place, added the remaining half quart of Blue Devil, and filled the radiator with 50/50 coolant and water. I then started the engine, set the heater on high and let it idle for two hours.Sunday was an even warmer day – about 70 degrees in N.E. Ohio in late February (I love this Global Warming thing!) But I knew almost immediately something was different. Where it used to take the heater forever to produce any noticeable heat, it came on like gang busters after only a few minutes. Where the temperature gauge used to fluctuate wildly, it was rock steady at just a tick under half way. It's been about a month since I did all this and absolutely nothing has changed. The heat still comes quickly and in quantity, the temperature gauge never budges above half way, and no more coolant on my garage floor. I've checked the coolant level several times and the radiator wouldn't accept more than about ¼ to ½ cup to fill to the top – about as full as you'll ever keep a cooling system. Because of the warm spring, I've even had several opportunities to use the air conditioner on a couple of 80 degree days and the temp gauge doesn't budge. Will this last? I have no idea – I'm in uncharted waters here. But the general consensus seems to be that if it eventually fails, you can just re-apply. For the money spent versus the estimated repair, I am truly a happy camper so far.

VS

Most Liked Negative Review

 

Causes more problems than it solvesevil

Do not put this [*] matter in your cooling system unless your car is going to quit forever very soon. In April 2011 I had a number 4 cyclinder misfire problem and used...Read complete review

Do not put this [*] matter in your cooling system unless your car is going to quit forever very soon. In April 2011 I had a number 4 cyclinder misfire problem and used my portable digital scan reader to diagnose the problem. I proceeded to buy and use the Blue Devil Head Gasket Sealant for the problem. I followed the directions on the bottle to the letter. One of the directions was to close off the interior heater before starting the car, driving the car, and then allowing car to cool off completely before reopening the heater core, which i did. It was April and the weather turned warm and stayed that way until October. Then was when I discovered that my interior heater would not work. I went back and forth to my mechanic. I replaced the radiator and water pump. Also had several flushes and back flushes done. Finally the mechanic scrubed the cooling system hoses and block. Whiteish gray pebbles came out of this scrub job according to him. Now the heater works OK after spending almost 1K on fixing this problem. In late January 2012 I e-mail the USA Sealant Company explaining the problem, expense, and to be reimbursed. We e-mailed back and forth and talked on the phone once. The final conclusion was that they will not pay any of my expenses. I did get a refund for the bottle at the auto parts store. The clerk there did say that this product would restrict and potentially block portions of your cooling system. Buyer beware this junk.

Reviewed by 82 customers

Displaying reviews 1-10

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(2 of 2 customers found this review helpful)

 
5.0

Follow the instructions, and it works!

By 

from Johnson City, TN

Verified Buyer

Pros

  • Potentially saves from a very expensive repair

Cons

    Best Uses

      Comments about BlueDevil Head Gasket Sealant:

      I've always been skeptical of pour in sealers, regardless of purpose. I tried Blue Devil after reading reviews all over the web. I followed the directions exactly, and so far, I've been rewarded. My '98 F150 4.6L was using a moderate amount of coolant, without a visible leak. Mechanic thought the head gasket may be blown. I've got about 500 miles on the truck since I put the Blue Devil in, and it hasn't used a drop or coolant. I'll keep my fingers crossed!

      • Was this a gift?:
      • No

      (1 of 1 customers found this review helpful)

       
      5.0

      Worked on a 94 accord 4cyl with a blown head gasket!

      By 

      from Lindenhurst, N.Y.

      Verified Buyer

      Comments about BlueDevil Head Gasket Sealant:

      I never write reviews but I chose this based on its reviews. I have a 1994 accord lx coupe with an I4 non vtech. I have had a slight internal head gasket leak for a few months and then my thermostat failed in the closed position. I overheated while on a trip to the Hamptons and destroyed the head gasket. The car was blowing huge amounts of white smoke. After researching all products available I chose this based on its reviews. I did not use a chemical flush. I flushed the system four times with distilled water and used this product three different times in two days. I have major OCD and wanted to be extremely thorough. It actually worked! The car no longer blows smoke and I have no more coolant loss. Just make sure you read the directions and understand the process. I definitely recommend this product!

      • Was this a gift?:
      • No
       
      1.0

      Failed Made the problem worse

      By 

      from mankato mn

      Verified Buyer

      Comments about BlueDevil Head Gasket Sealant:

      dont wast your money

      • Was this a gift?:
      • No

      (1 of 1 customers found this review helpful)

       
      5.0

      READ THE INSTRUCTIONS DUMMY!!!!!

      By 

      from Hartsville, SC

      Comments about BlueDevil Head Gasket Sealant:

      Read many reviews before I bought this stuff and let me tell you, I was amazed on how well it worked and still going strong. The reviews I read just told me that many DID NOT read the intructions well or they just can't read. I run into that every day at work at a home improvement store and I run into many that DO NOT read instructions and expect us to accept their returns due to their ignorence. Also I noticed some negitive reviews from the same person on these reviews and other web site reviews. They (he or she) are nothing but internet trouble makers. They should at least change their review comments and not make it the same in every web site that sells this product. Enought of that...let me get to the point of the product. Yes, it is time consuming if you want it done correctly. Evry vehicle is defferent, so might to you more time or might take you less. I did it all in one weekend and took my sweet time doing it. I read the instructions carefully and also did lots of reseach videos on YOUTUBE which will help you understand the product very well. If you take very good care of your vehicle, this product will work very good. Now if your problem is much bigger then this product can handle, better get a new vehicle. Mine had a blown head casket after I ran test on it. I was praying that the blown gasket was not that big as it was using a gallon of anti-freeze daily. No signs of leakage. It was burning the anti-freeze interanlly. Take your time, don't rush it, flush your system, remove termistat, pour product (slowly), idle for 50 minutes longer if needed. Let it sit for 24 hours, drain system and your anti-freeze and go. Easy as 1-2-3 if you take your time and read!!!!

      • Was this a gift?:
      • No
       
      3.0

      Did not work for me.

      By 

      from Augusta Ga

      About Me Budget Shopper

      Verified Buyer

      Pros

      • Will work for most head problems

      Cons

      • Must remove thermostat

      Best Uses

        Comments about BlueDevil Head Gasket Sealant:

        My brother in law loves this stuff. Worked on many of his head gasket problems. This did not work for mine. Gmc trailblazer has a thermostat that is on the bottom right side of the engine, behind the alternator. Takes forever to remove from the housing really its not meant to be taken out. Thermostat comes with the metal housing unlike most every other thermostat in the world where you just pop one in. Anyhow my engine is over pressurizing the cooling system thru some cylinder leak/crack. I was hopeful this would work magic but this type of head problem is difficult to fix with dope. It's not the products fault this stuff will work just not for me.

        • I Am A:
        • Family Young Kids
         
        5.0

        Worked Like a Charm

        By 

        from Augusta, Georgia

        About Me Budget Shopper

        See all my reviews

        Verified Buyer

        Pros

        • Comfortable

        Cons

        • Delicate

        Best Uses

          Comments about BlueDevil Head Gasket Sealant:

          This product worked great. If you follow instructions.

          • I Am A:
          • Family Older Kids
           
          4.0

          Good stuff

          By 

          from Romney WV

          About Me Midrange Shopper

          Verified Buyer

          Comments about BlueDevil Head Gasket Sealant:

          This product great for younger people to use and save money

          • I Am A:
          • Family Young Kids

          (0 of 2 customers found this review helpful)

           
          1.0

          "DON'T USE THIS PRODUCT UNLESS YOU WANT TO BUY A NEW MOTOR"

          By 

          from Charleston, WV

          About Me Midrange Shopper

          Comments about BlueDevil Head Gasket Sealant:

          I took my 2008 Nissan Altima to my mechanic because it was leaking antifreeze and running hot. Test were ran on the car and it had a blown head gasket. The mechanic suggested using BLUE DEVIL HEAD GASKET SEALER because it was guaranteed to work and would cost a lot less than having a head gasket repaired. He used it and in less than two weeks the car started leaking antifreeze and running hot again. I then took it back to the mechanic and he put a new water pump on it thinking that was the problem but the antifreeze continued to leak. After going back to the mechanic for the third time he once again used the BLUE DEVIL HEAD GASKET SEALER and after another two weeks it started leaking antifreeze and running hot again. I then took the car to the dealer and was told to immediately quit driving the car because the antifreeze and oil had mixed together and gotten on all the other parts of the engine and if it got too hot could catch on fire. Replacing my head gasket from the beginning would have been much less costly than having to replace my motor but now I have to have it replaced. This product is not worth the container it comes in..DO NOT BUY THIS PRODUCT...

          (1 of 1 customers found this review helpful)

           
          1.0

          Use if you want a plugged up heater core

          By 

          from New England

          About Me Auto Enthusiast

          Pros

            Cons

            • Plugs Everything

            Best Uses

            • Roadside Repairs

            Comments about BlueDevil Head Gasket Sealant:

            manufacturer will refund cost of product but then
            you have to to deal with plugged car

            (1 of 1 customers found this review helpful)

             
            1.0

            CLOGS EVERYTHING! DO NOT USE!!!

            By 

            from Easton, PA

            Pros

              Cons

              • Can't Find Clog
              • Clogs Everything

              Best Uses

              • None

              Comments about BlueDevil Head Gasket Sealant:

              Do not buy this product and put it in your car. You've been warned. It clogs everything and you won't be able to find where it is clogged.

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              Do you have questions about this product?

               

              Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

              147 Questions | 161 Answers
              Displaying questions 1-10Previous | Next »
              • Q:

                I have 2004 Chevrolet 2500HD duramax diesel engine with symptoms of a head gasket going bad. Will this product fix problem and how much should I use?
                Asked on 9/27/2016 by Al from Burton, Mi

                1 answer

                • CUSTOMER CARE

                  A:

                  Yes, Al! This BlueDevil Head Gasket Sealant - Part No. 38386 will repair and seal leaks in blown head gaskets. With the engine idling, slowly pour BlueDevil into the radiator (take 1 minute pour time for entire bottle - 30 seconds for 1/2 bottle). After pouring BlueDevil slowly, let vehicle idle with Cap On for 50 minutes. You do not need to flush the system a second time after process is complete. Please click the below link to view the instruction video of this product:

                  https://www.youtube.com/watch?feature=player_embedded&v=jDFW7ezbPlc

                  Answered on 9/28/2016 by Solomon from AAP
              • Q:

                I BOUGHT A BOTTLE SOUNDS LIKE PEOPLE HAV HAD GOOD SUCCESSS I HAV ONE QUE3STION THE HEATER CORE IS BAD SO I GOT THE CAR WITRH THE HEATER CORE BYPASSED.SO IS IT GONNA BE A PROBLEM DO I LEAVE IT BYPASSED OR HOOK IT UP WIUTH THE BLUE DEVIL SPILLING ONTO FLOOR PLESE MR WIZARD HELP ME......VEGAS BABY
                Asked on 8/28/2016 by SCHULTZY from VEGAS BABY

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Schultzy, glad to assist you! BlueDevil Head Gasket Sealant will repair and seal leaks in Blown Head Gaskets, Warped or Cracked Heads, Heater Cores and Freeze Plugs. BlueDevil contains no solid or particulate matter and will not clog or harm your engine. It bonds to metal, aluminum, cast, alloy or plastic. BlueDevil is safe, easy to use and compatible in gasoline & diesel engines. However, without the presence of your vehicle we would not be able to properly diagnose it, nor provide you with a 100% answer.
                  I would suggest that you take your vehicle and get it thoroughly checked by a certified mechanic before buying any parts that may/may not solve the problem.

                  Answered on 8/31/2016 by Steve from AAP
              • Q:

                I have a 2003 Ford F350 Super Duty with the 6.0 Diesel, and about 300k miles on it with a cracked head per the diesel mechanic. The diesel shop said not to use this product. With regards to the product and before I buy it, how much of the product should I use when I do buy it? Also, I have reviewed the Q & A's, is the thermostat replacement required following the proper usage of the product? Is there anything else that I should be aware of? Any pitfalls?
                Asked on 8/16/2016 by Scott from Moyock, NC

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Scott, I'm happy to help you! We recommend adding 1.5 quarts (bottles) of BlueDevil Head Gasket Sealer to treat your Ford F-350. We recommend that the thermostat is removed and left out of the system while BlueDevil is being run through; this allows for free flow. You do not necessarily have to replace the thermostat as you can reinstall your old thermostat after the process is complete. As long as the directions on the bottle are followed and you are not dealing with an extreme leak then you should have no problem sealing it using BlueDevil.

                  Answered on 8/17/2016 by Solomon from AAP
              • Q:

                I have a 2007 chevy hhr with over 200,000 miles on it. my mechanic just told me it will cost $2400 for a new engine and $1300 for a head job. apparently my heads are leaking coolant. a friend just informed me about the blue devil sealant. the mechanic also recommended this. how well will this work and how do I use it correctly? I plan on trading the car in, in a year or so.
                Asked on 7/27/2016 by regway inc from long beach, ca

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Regway Inc, happy to help you! This BlueDevil Head Gasket Sealant (Part No. 38386) permanently seal your blown head gasket. If you have a small leak or 4 or 6 cylinder engine, you can simply add it to your radiator and your head gasket leak will be sealed as your drive. For larger leaks or 8 cylinder engine the BlueDevil Head Gasket Sealer requires the removal of your vehicles thermostat and a complete cooling system flush but is guaranteed to fix your blown head gasket. It is safe to use in all water-cooled systems. It is non-clogging and is 100% chemical. It does not contain any filings or pellets that can plug up radiators. BlueDevil will bond to all metal types-aluminum, steel, cast iron, even plastic cores and tanks. For more information, I would suggest that you contact the BlueDevil directly at 1.888.863.0426 and they would be in a better position to help you.

                  Answered on 7/28/2016 by Steve from AAP
              • Q:

                I have a 2000 Land Rover Discovery II. Have there been any issues with using this product on their engines? Any special tips?
                Asked on 3/8/2016 by flippper278 from Strawberry Plains, TN

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Flippper278, happy to help you! This BlueDevil Head Gasket Sealant (Part No. 38386) permanently seal your blown head gasket. If you have a small leak or 4 or 6 cylinder engine, you can simply add it to your radiator and your head gasket leak will be sealed as your drive. For larger leaks or 8 cylinder engine the BlueDevil Head Gasket Sealer requires the removal of your vehicles thermostat and a complete cooling system flush but is guaranteed to fix your blown head gasket. It is safe to use in all water-cooled systems. It is non-clogging and is 100% chemical. It does not contain any filings or pellets that can plug up radiators. BlueDevil will bond to all metal types-aluminum, steel, cast iron, even plastic cores and tanks. For more information, I would suggest that you contact the BlueDevil directly at 1.888.863.0426 and they would be in a better position to help you.

                  Answered on 3/9/2016 by Steve from AAP
              • Q:

                How does this help a cracked or warped head if you put it in your overflow?
                Asked on 12/15/2015 by Stacy from United States

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Stacy, I'm glad to assist you. This BlueDevil Head Gasket Sealant (Part No. 38386) permanently seal your blown head gasket. If you have a small leak or 4 or 6 cylinder engine, you can simply add it to your radiator and your head gasket leak will be sealed as your drive. For larger leaks or 8 cylinder engine the BlueDevil Head Gasket Sealer requires the removal of your vehicles thermostat and a complete cooling system flush but is guaranteed to fix your blown head gasket.

                  Answered on 12/17/2015 by Steve from AAP
              • Q:

                I have a 2004 pontiac grand am gt and have water in my oil with overheating. I used a cheap bottle of sealant previously and it held for only a short period. I am so scared of clogging the system up. I watched a video on bypassing the water resevoir and radiator. This is how I put the cheap bottle in. Would this product be better to put in as I described and what about clogging up my thermastat as it is in a very hard place to remove. Please help!!!
                Asked on 7/9/2015 by Tamara from Georgetown, Fl

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Tamara, glad to help you! The BlueDevil head gasket sealant is safe to use in all water-cooled systems. It is non-clogging and is 100% chemical. It does not contain any filings or pellets that can plug up radiators. BlueDevil will bond to all metal types-aluminum, steel, cast iron, even plastic cores and tanks. For more information, I would suggest that you contact the BlueDevil directly at 1.888.863.0426 and they would be in a better position to help you.

                  Answered on 7/10/2015 by Steve from AAP
              • Q:

                after using this my 1998 Honda civic is overheating. I have flushed the system several times. What else can be done
                Asked on 5/30/2015 by dazey from el dorado hills ca

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Dazey, glad to assist you! I would recommend that you solve all cooling related problems first. For example a defective fan switch, fan clutch, clogged or restricted cores, heavy scale and sediment deposits, or systems jellied from antifreeze must all be properly functioning and capable of adequately cooling the vehicle. If you still face the same issue, I would suggest that you take your vehicle and get it thoroughly checked by a certified mechanic before buying any parts that may/may not solve the problem.

                  Answered on 5/30/2015 by Steve from AAP
              • Q:

                Is this product safe and guaranteed to work with Dex-cool?
                Asked on 4/6/2015 by adam from Beeville, Tx

                1 answer

                • CUSTOMER CARE

                  A:

                  I'm happy to help, Adam! BlueDevil Head Gasket Sealant (Part No. 38386) is safe to use in all water-cooled systems. It is non-clogging and is 100% chemical. It does not contain any filings or pellets that can plug up radiators. BlueDevil will work when the diagnosis is correct and it has been used in accordance with the directions.

                  Answered on 4/6/2015 by Heath, ASE Parts Specialist from AAP
              • Q:

                how long does it work for
                Asked on 2/25/2015 by tom from columbus, ohio

                1 answer

                • CUSTOMER CARE

                  A:

                  Happy to help you with your question Tom! This head gasket sealant does not have a specific time that it will provide its fix. This is used more for a temporary fix until you can replace the head gasket.

                  Answered on 2/25/2015 by Panda from AAP
              Displaying questions 1-10Previous | Next »

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