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 66 reviews)

Ratings Distribution

  • 5 Stars

     

    (38)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (5)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (16)

72%

of respondents would recommend this to a friend.

Pros

  • Easy to use (37)
  • Reliable (23)
  • Can withstand use (12)
  • Compact (6)

Cons

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

Best Uses

  • Home garage (41)
  • Automotive repair shop (17)
  • Roadside repairs (5)
  • Upkeep (3)
    • Reviewer Profile:
    • Casual driver (8), Auto enthusiast (6), Mechanic (5)
    • Reviewer Profile:
    • Auto enthusiast (16), Casual driver (16), Mechanic (12), Competitive driver (4), Truck enthusiast (4)

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

 

Still have a cylinder head leak!

My Plymouth Neon with 102,000 mile is still having a head gasket leak even trying Blue Devil Head Gasket Sealer. I thought the expensive stuff would have worked but its back to the drawing...Read complete review

My Plymouth Neon with 102,000 mile is still having a head gasket leak even trying Blue Devil Head Gasket Sealer. I thought the expensive stuff would have worked but its back to the drawing board. It seems I will have to pull the head and do it the right way. Probably 400 bucks to do the job? The product is easy to install and does not take very long for preparation. I sent the claim form in to get my money back. They say on their web page that it is 100 percent guaranteed and you are supposed to get a response within 72 hours. I hope this helps out customers that decide to try this product. Who knows, maybe it works on smaller leaks.

Reviewed by 66 customers

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5.0

Excellent product

By Brad da Man

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,

    Comment on this review(earn points)

     
    5.0

    IT WORKS

    By GOGHB

    from Monroe NY

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

    Pros

    • Can Withstand Use
    • Easy To Use
    • Reliable

    Cons

      Best Uses

      • Home Garage

      Comments about BlueDevil Head Gasket Sealant:

      purchased my 1997 f150 4x4 last December with over 200k miles. About 2 mounts into truck it over heated and had bubbles in the water tank.
      I used this product as directed it worked. It did take two bottles , the first bottle really slowed downed the bubbles so added another and it stop. Now I'm almost a year with no problems

      GREAT PRODUCT

      Comment on this review(earn points)

       
      5.0

      Hope it's good

      By Brad da man

      from Fitzgerald, GA

      About Me Casual Driver

      3 or more reviews submitted

      Pros

      • Compact Design
      • Easy To Use
      • Reliable

      Cons

        Best Uses

        • Automotive Repair Shop

        Comments about BlueDevil Head Gasket Sealant:

        I went and got some of this stuff, now I hope that it will prove to work as much as it costs, it gets even better I was smart enough to use a coupon that on here and save 40% off of this high price head gasket sealant stuff. I don't want to take it to no shop and pay so much for a head gasket job to be done to my ford f150. I have a blown head gasket, not a good sign period. If it prove to work, I'll be putting another review on here.

        Comment on this review(earn points)

         
        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)

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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.

                        132 Questions | 146 Answers
                        Displaying questions 1-10Previous | Next »
                        • Q:

                          I just installed a thermostat on my 94 325is BMW. Would this product work on a BMW of that year and model?
                          Asked on 11/10/2014 by El Macho from DC

                          2 answers

                          • CUSTOMER CARE

                            A:

                            Yes El Macho, BlueDevil 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. 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 11/12/2014 by Steve from AAP
                          • CUSTOMER CARE

                            A:

                            Yes El Macho, BlueDevil 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. 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 11/12/2014 by Steve from AAP
                        • 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
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                        Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.