Head Gasket Sealant
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BlueDevil Head Gasket Sealant

Part No. 38386 Warranty Details  
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
 
3.5

(based on 75 reviews)

Ratings Distribution

  • 5 Stars

     

    (39)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (5)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (22)

68%

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)
    • 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 75 customers

Displaying reviews 1-10

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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...

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(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

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    (1 of 1 customers found this review helpful)

     
    1.0

    CLOGS EVERYTHING! DO NOT USE!!!

    By 

    from Easton, PA

    Level 1

    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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      (0 of 1 customers found this review helpful)

       
      4.0

      Positive experience for me

      By 

      from Northern Maryland

      About Me Casual Driver

      Comments about BlueDevil Head Gasket Sealant:

      I needed a service center to use Blue Devil for me because I am disabled. We tried it on the recommendation of a friend who said it would seal the small leak my 98 Windstar had by the "front seal plate," though the service center was unfamiliar with the product. The work was done in May, 2015, and so far, (July, 2015) the van is doing just fine, though the repair shop was expensive for me. My van has been modified for the hauling of my mobility scooter or wheelchair, so BLUE DEVIL was my last resort. As of this writing, I would certainly recommend the product. It seems to be working as promised.

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      (3 of 3 customers found this review helpful)

       
      5.0

      Great Stuff

      By 

      from Clearwater, Fl

      About Me Casual Driver

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Upkeep

        Comments about BlueDevil Head Gasket Sealant:

        Was going through 2 bottles of fluid a day had a bad leak . Put Blue Devil in as instructed let idle for 50 minutes worked perfectly no overheating. Wish I had used this product first before I replaced my radiator, water pump, Hoses etc... when this is probably what it needed in the first place.

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        (2 of 4 customers found this review helpful)

         
        1.0

        Use at last resort!!

        By 

        from Cranston, RI

        About Me Mechanic

        Level 1

        Pros

          Cons

          • Clogs Catalytic Convertor
          • Clogs Radiator
          • Clogs Radiator And Heater

          Best Uses

            Comments about BlueDevil Head Gasket Sealant:

            use as last resort before you have it towed to the junkyard. Makes a mess internally of engine and if you go to fix head gasket it will be a nightmare to clean passages. Remove catalytic convertor and bypass heater core first, may clog radiator

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            (1 of 2 customers found this review helpful)

             
            1.0

            a waste of money !!

            By 

            from Columbus NJ

            About Me Retired Auto Tech

            Level 1

            Pros

            • Pretty Bottle

            Cons

            • Bd Didn't Respond To Emai
            • Time Consuming An Costly

            Best Uses

            • None

            Comments about BlueDevil Head Gasket Sealant:

            Co check done with Blue Point chemical tester before an after application showed positive results.Vechile was still overheating.I emailed BD as to results for possible warranty an never received any sort of return
            mail. Engine in question was a Northstar which i believe is stated on bottle.

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            (2 of 3 customers found this review helpful)

             
            1.0

            Didn't work for me

            By 

            from FL

            About Me Mechanic

            Pros

              Cons

              • Difficult To Use

              Best Uses

                Comments about BlueDevil Head Gasket Sealant:

                Didn't work for me and BlueDevil wouldn't return my money

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                (0 of 3 customers found this review helpful)

                 
                4.0

                You have to try it to believe it.

                By 

                from Maryland

                About Me Auto Enthusiast, Casual Driver, Competitive Driver, Mechanic, Truck Enthusiast

                Ask me a question

                Verified Buyer
                3 or more reviews submitted

                Pros

                • Compact Design
                • Easy To Use
                • Reliable

                Cons

                  Best Uses

                  • Automotive Repair Shop
                  • Home Garage

                  Comments about BlueDevil Head Gasket Sealant:

                  Customer came to me complaining about loss of power and white smoke coming out the tailpipe. Followed the directions and 1 hour later the white smoke is gone and the engine power is back. Things that aren't so great is you have to remove the thermostat.

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                  (1 of 3 customers found this review helpful)

                   
                  5.0

                  Excellent product

                  By 

                  from Fitzgerald, GA

                  About Me Casual Driver

                  Ask me a question

                  Level 5

                  Pros

                  • Can Withstand Use
                  • Compact Design
                  • Easy To Use
                  • Reliable

                  Cons

                    Best Uses

                    • Home Garage

                    Comments about BlueDevil Head Gasket Sealant:

                    Well hey I have some news to share with you all, how about I finally put the blue devil head gasket sealant stuff in my ride this morning November 4th after doing all of the necessary steps to ensure it will do it's job right, the first five to ten minutes of cranking up my ride when I slowly poured the sealant in slowly when I shook it up good so it can mix up right, and I turned the heater on max high as indicated on the bottle right, I saw some smoke at first as it was reaching normal temperature right, then within 20 minutes and so on, the smoke disappeared from the tail pipe, and from that point on up to 50 minutes I was not seeing no more smoke and I said to myself, this product actually really does it's job as indicated, time will tell how long it will it will last, if it is a permanent sealant then that sounds like it is a permanent repair guaranteed. I do not feel like spending money to have the head gaskets cleaned and stuff, oh no. So I'm ready to take my ride for a test and reveal the results,

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                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                    143 Questions | 157 Answers
                    Displaying questions 1-10Previous | Next »
                    • 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
                    • Q:

                      I have a 1998 Lincoln townecare with a cracked non-metallic intake. Will this product seal/repair the cracked intake?
                      Asked on 1/1/2015 by AL

                      1 answer

                      • CUSTOMER CARE

                        A:

                        I'm glad to help, AL! Yes, the product has and will work for a cracked intake.

                        Answered on 1/5/2015 by Solomon
                    • Q:

                      I must have poured Blue Devil too fast and clogged the radiator.
                      I can look through the radiator cap and see small chunks that look like concrete. The truck will overheat in about 30 minutes.

                      Is there a way to clean this out?

                      If I take the radiator out and lay it flat, would something like Drano, paint thinner, maybe gas, or some strong chemical poured into the radiator to fill it up, loosen those chunks up so I can use a garden hose to flush it out?
                      Asked on 12/29/2014 by tyeebch from seattle

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Tyeebch, glad to assist you! Yes, the small chunks you see are telltale signs of a radiator that is in need of service. When you do not change the fluids often enough under severe operating conditions or in areas with hard water, scale deposits form in the passages of the core. Sometimes these old fluids will jell or crystallize and can be seen in the system. You may need to flush the cooling system using a flushing agent or a flushing machine to remove these chunks.

                        Answered on 12/30/2014 by Steve from AAP
                    • Q:

                      how many bottles are needed for a 1999 k3500 with 350 engine
                      Asked on 12/27/2014 by chuck from ballwin Mo

                      1 answer

                      • CUSTOMER CARE

                        A:

                        I'm glad to assist, Chuck! Use 1/2 quart for a 3 gallon cooling capacity, 1 quart for up to a 4.5 gallon cooling capacity, 1-1/2 quarts for 6 gallon cooling capacity, and 2 quarts for up to a 7.5 gallon cooling capacity.

                        Answered on 12/29/2014 by Solomon
                    • Q:

                      I have a 2004 Pontiac Grand prix is it safe to use Blue Devil in this car that uses DEX Cool antifreeze?
                      Asked on 12/20/2014 by rap from redford,mi

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Good question Rap! 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.

                        Answered on 12/22/2014 by Steve from AAP
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