Head Gasket Sealant
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BlueDevil Head Gasket Sealant

Part No. 38386 Warranty  
Blue Devil Head Gasket Sealant will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. Blue Devil contains no solid or particulate matter, and will not clog or harm your engine. It bonds to metal, aluminum, cast, alloy, or plastic, and its safe and easy to use. Blue Devil is compatible in gasoline and diesel engines.

Product Features:
  • Permanent repair for Head Gaskets, Warped or Cracked Heads, Heater Cores , and Freeze Plugs
  • Contains no solid or particulate matter that can harm engines
  • Alternative solution for costly, or time consuming repairs
  • 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
 
3.7

(based on 63 reviews)

Ratings Distribution

  • 5 Stars

     

    (35)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (5)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (16)

71%

of respondents would recommend this to a friend.

Pros

  • Easy to use (34)
  • Reliable (20)
  • Can withstand use (10)
  • Compact (4)

Cons

  • Flimsy (4)
  • Difficult to use (3)

Best Uses

  • Home garage (39)
  • Automotive repair shop (16)
  • Roadside repairs (5)
  • Upkeep (3)
    • Reviewer Profile:
    • Casual driver (8), Auto enthusiast (6), Mechanic (5)
    • Reviewer Profile:
    • Auto enthusiast (15), Casual driver (14), Mechanic (11), Competitive driver (3), Truck enthusiast (3)

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 63 customers

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1.0

Do not buy this

By Zachary

from South Carolina

Pros

    Cons

    • Flimsy

    Best Uses

      Comments about BlueDevil Head Gasket Sealant:

      Not only did it not work, it clogged up my coolant system and possibly ruined my heater core.

      Comment on this review(earn points)

      (2 of 2 customers found this review helpful)

       
      5.0

      It worked for me

      By The Preacher

      from Augusta Ga.

      About Me Casual Driver

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Home Garage

        Comments about BlueDevil Head Gasket Sealant:

        Tried the product last summer, still driving my 96 Taurus
        no more issues with head gasket so far. It worked for me.

        Comment on this review(earn points)

        (3 of 6 customers found this review helpful)

         
        5.0

        BLUE DEVIL works GREAT

        By Naquin57

        from Memphis,TN USA

        About Me Casual Driver

        Verified Buyer
        Level 2

        Pros

        • Can Withstand Use
        • Compact Design

        Cons

          Best Uses

          • Home Garage

          Comments about BlueDevil Head Gasket Sealant:

          Be sure to read and understand before you start

          Comment on this review(earn points)

          (3 of 5 customers found this review helpful)

           
          4.0

          I'm a believer

          By Dano

          from Ft. Lauderdale.

          About Me Auto Enthusiast, Backyard Mech

          Pros

          • Reliable

          Cons

          • Difficult To Use

          Best Uses

          • Home Garage

          Comments about BlueDevil Head Gasket Sealant:

          I installed a new water pump and radiator in a friend's beat up 97 Explorer... but before i even took it out for a test drive, I found another serious leak behind the engine block on the passenger side. TOTAL FRUSTRATION! Even with a mirror, I couldnt get a proper visual to tell if it was from the head gasket or a freeze plug. With no wad of cash left for head work, I consulted my EXCELLENT mechanic friend. He told me about BLUE DEVIL and explained how important it was to *follow the directions carefully* I'm a huge skeptic of miracle cures so i did hours of internet research but found NO real examples of it being used to fix leaky freeze plugs... which it claims to do. I finally broke down and bought some anyway... and followed all the directions, using only half the bottle. In less than half an hour... no more dripping!!! I let it run for the full hour. Too tired for a test drive and with almost no gas left(oops), I shut it down for the night. We tested it the next morning and it has worked fine ever since.. that was almost 2 months ago. I dont know HOW it works... I just know it DOES. I hope i never need to use the rest of the bottle... but i'm hangin onto it just in case.

          Comment on this review(earn points)

          (3 of 6 customers found this review helpful)

           
          5.0

          I would use this product again

          By goghb

          from Monroe

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

          Verified Buyer
          Helpful Reviewer

          Pros

          • Can Withstand Use
          • Compact Design
          • Easy To Use
          • Great It Works
          • Reliable

          Cons

          • None

          Best Uses

          • Automotive Repair Shop
          • Home Garage
          • Roadside Repairs

          Comments about BlueDevil Head Gasket Sealant:

          It works great

          Comment on this review(earn points)

          (3 of 6 customers found this review helpful)

           
          1.0

          Waste of time and money product.

          By Bolt

          from Dorraine, Pa.

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

          Pros

            Cons

              Best Uses

                Comments about BlueDevil Head Gasket Sealant:

                Did all the procedure as directed, and actually the product made the problem worst. My advice over price waste of time, which means price does not make a good product.

                Comment on this review(earn points)

                (4 of 4 customers found this review helpful)

                 
                5.0

                Really Works

                By Brock

                from Bloomdale, OH

                About Me Mechanic

                Ask me a question

                Level 4

                Pros

                • Easy To Use
                • Reliable

                Cons

                  Best Uses

                  • Home Garage

                  Comments about BlueDevil Head Gasket Sealant:

                  It surpised me that it actually worked. I did make sure I follow the directions including flushing with water and a cleaner. If it lasts a year I will be happy and then I will just do it again. Great product but read the reviews so you make sure you do it right.

                  Comment on this review(earn points)

                  (2 of 5 customers found this review helpful)

                   
                  4.0

                  It Works

                  By T-Richard

                  from Tuckerton, NJ

                  About Me Casual Driver

                  Ask me a question

                  Verified Buyer
                  Level 2

                  Pros

                  • Easy To Use
                  • Reliable

                  Cons

                    Best Uses

                    • Automotive Repair Shop
                    • Home Garage

                    Comments about BlueDevil Head Gasket Sealant:

                    Used it more than once. Saved a major expense of replacing head gasket.

                    Comment on this review(earn points)

                    (3 of 6 customers found this review helpful)

                     
                    1.0

                    Didn't help

                    By Avianaut

                    from FL

                    About Me Auto Enthusiast

                    Verified Buyer
                    Helpful Reviewer

                    Pros

                      Cons

                      • Flimsy

                      Best Uses

                        Comments about BlueDevil Head Gasket Sealant:

                        Didn't help the head gasket leak and clogged up my water pump.

                        Comment on this review(earn points)

                        (5 of 9 customers found this review helpful)

                         
                        5.0

                        Awesome Product it works!

                        By Goodmanheelzfan

                        from Charlotte, NC

                        About Me Auto Enthusiast

                        Level 2

                        Pros

                        • Easy To Use
                        • Reliable

                        Cons

                          Best Uses

                          • Home Garage
                          • Roadside Repairs

                          Comments about BlueDevil Head Gasket Sealant:

                          2001 Dodge Dakota with bubbling radiator overflow tank and running hot in the winter. Removed thermostat, flushed system, rinsed system, sat overnight and added 16oz as directed and ran for 50 minutes. Let cool and drove for a day without the thermostat and the bubbles were gone and overheating issue is gone. Added thermostat and antifreeze back in and it is running as good as new. 198,000 mile engine and I hope this lasts another 100,000 miles. Saved me a $1500 head job on a 200,000 motor.

                          Comment on this review(earn points)

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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.

                          131 Questions | 144 Answers
                          Displaying questions 1-10Previous | Next »
                          • Q:

                            I have a 97 Cadillac Deville. I follow the instructions exactly. I let it idle for 50 minutes but my temperature was 239. I let it cool down and check my water and it was full (which was good). For about 8 miles the temperature was 205 then suddenly shot to 215 and higher rapidly. You think I drove it too soon? Should I have waited 24 hours? Should I try again?
                            Asked on 10/1/2014 by Glenn from Tampa, Fl

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Glenn, Sorry, 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 10/2/2014 by Steve from AAP
                          • Q:

                            do I have to remove my thermostat when using Blue Devil sealant
                            Asked on 9/8/2014 by charlie from canton ga

                            2 answers

                            • CUSTOMER CARE

                              A:

                              Yes Charlie, you will need to remove thermostat to use Blue Devil sealant.

                              Answered on 9/9/2014 by Steve from AAP
                            • CUSTOMER CARE

                              A:

                              Yes Charlie, you will need to remove thermostat to use Blue Devil sealant.

                              Answered on 9/9/2014 by Steve from AAP
                          • Q:

                            hi,
                            do you shipping to italy?
                            thanks
                            Asked on 8/11/2014 by olga from Italia

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Olga, glad to assist you! At this time we only ship to any United States and APO/FPO addresses. Shipping to international addresses may become available at later date. Please watch for more information on our new website as it becomes available!

                              Answered on 8/14/2014 by Vincent from AAP
                          • Q:

                            I have a cracked block on a 1999 ford mustang will this work for my car
                            Asked on 5/29/2014 by terri

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Terri, glad to assist you! This product will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. It bonds to metal, aluminum, cast, alloy, or plastic, and its safe and easy to use.

                              Answered on 5/30/2014 by Steve from AAP
                          • Q:

                            I have a 2003 Saturn Ion 2 2.2L.It don't have a cap on the Radiator it has a coolant holding tank that leads to Radiator.Will this Blue Devil Head Gasket Repair be ok to stick in the Coolant holding tank?
                            Asked on 4/20/2014 by mike from Latonia Ky

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi mike, I'm glad to assist you! If your vehicle has a reservoir/overflow rather than a radiator cap, instead of pouring it through the reservoir/overflow, with the car off and engine cold, you may add the product through the top radiator hose. Once it has been added reconnect the hose and start the idle from that point.

                              Answered on 4/21/2014 by Steve from AAP
                          • Q:

                            will the blue devil help me on my head gasket in a 2006 dodge stratus? its a 2.7 v6 and i just dont have the money and i need it to be safe and reliable for my 1 year old....
                            Asked on 4/14/2014 by Victoria from Newark

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hello Victoria, Yes, BlueDevil Head Gasket Sealant wil permanently seal a leaking head gasket.

                              Answered on 4/15/2014 by Wil from AAP
                          • Q:

                            I have a 1995 pontiac grand am with a blown head gasket, would this product help fix it or at least slow the leak?
                            Asked on 3/28/2014 by ivanrarri

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Ivanrarri, glad to assist you! This Blue Devil Head Gasket Sealant will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs.

                              Answered on 3/30/2014 by Steve from AAP
                          • Q:

                            will it seal hoses leaks and small head leak and plugs in block
                            Asked on 2/2/2014 by roughhouse from minor hill tn

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi roughhouse, glad to help you! The BlueDevil Head Gasket Sealer 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, aluminium, cast, alloy, or plastic, and it’s safe and easy to use. BlueDevil Head Gasket Sealer is compatible in gasoline and diesel engines. It stops leaks permanently.

                              Answered on 2/4/2014 by Steve from AAP
                          • Q:

                            Can this be used again if the same problems starts again?
                            Asked on 1/23/2014 by lori

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Lori, happy to help! Yes, the sealant can be used again to repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs.

                              Answered on 1/24/2014 by Steve from AAP
                          • Q:

                            Hello AAP I have a 03 buick century it starts to over heat 10 mins into ridingap replace radiator water pump now i see bubbles by the heat sensor is that a sign of my gasket being cracked
                            Asked on 1/3/2014 by Maurice from United States

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Maurice, great question! Bubbles in the heat sensor may be a symptom of gasket being cracked. However, the answer to this is bit more complicated than you think. This needs an expertise to determine. I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not solve or be the problem.

                              Answered on 1/5/2014 by Vincent from AAP
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