"My Girlfriend gave me a 1998 Cadillac SLS as an early Christmas present in November, and I was concerned with the Northstar engine problems. Well of course the car overheated the first time I drove it, and the dealer wouldn't do anything. I decided to try the Blue Devil Head Gasket fix, Figured 65.00 was better than the 2-5000.00 fix. Worked like a charm. Drove the car to Las Vegas over the holiday and ran like a Cadillac Should. I have and will continue to recommend the product to anyone that has an over heating problem. Great Products that actually works." - Scott

"A mechanic at triple A recommended your product verses a $1600 head job. I have tried products similiar to this before, with no luck. As you know, im sure this product workes!!I will recommened to everyone, going to get my son a bottle this weekend.Thank you so much!!! BLUE DEVIL IS GREAT" - Danny

"Guys, Not having anything to lose and everything to gain I used BlueDevil. I initially was not very impressed. I drove the car twenty miles and had to top it off with water. Your recommendation of leaving it in is a good one The longer I have left it in the better it works. I checked the fluid level last Saturday and it was within normal limits. I have been running the air for three days and so far so good!! At this point I think Blue Devil is a winner. Thanks Soo much and Pass along my kudos, Roy M. Munson Pine City, New York "
Roy Munson - Arnot Ogden Medical Center

"I used BlueDevil two years ago and after 15,000 miles my car is still running strong with no problems. I recommend your product to everyone! "
Luis - San Diego, CA

"BlueDevil saved my car! It completely sealed my cracked engine block. I couldn't believe it! In this day and age, finding something that actually works and does what it says is far and few between. Congratulations on a great product! " Tracey - El Sobrante, CA

"BlueDevil works! It saved me from having to junk the car altogether or tearing down the engine to replace the block. The car is so old it just wouldn't be worth that kind of investment. Finally, a product that works as advertised. Thank you!" Darrell - Auto Parts Store Manager

"BlueDevil saved me from spending over $2,000 on a head gasket repair and my Lincoln is still running fine a year later. Thank you so much for this miracle product! " Ernie - Oxford, MS

"Used your BlueDevil, worked great!! "William - Alto, MI

"What a product! The BlueDevil products are amazing. It helped stop my power steering from leaking on my 1998 Land Rover Discovery. BlueDevil is a great and easy to use product. It saves time and money, and it really works! No more costly repairs and time lost at dealerships or mechanics. Just follow the directions, it is just that easy! No more black spots on the driveway. I would recommend this to every do-it-yourselfer out there." B Rosenberg


"Just thought I'd drop a note of my experience with BlueDevil Head Gasket Sealer, the yellow label. I know it says that it's not recommended for the North Star motor but I had to give it a shot. I think the bottle states that because the North Star usually has head bolt issues and a sealant may be a tough fix. Anyway, I had a shop do the treatment (they weren't thrilled about it, but the they did it) and made sure that they followed the instructions explicitly. It worked! More than a 1,000 miles later it is still holding. That and consider I live in Phx, AZ so may average outside temp for the last 1,000 miles has been over 100 degrees and I'm pretty impressed!! I don't think I got lucky, I think conditions were just right. My leak was very slight, we followed the instructions and the circumstances were right. Thanks, great stuff." - Gino Niccoli - Phoenix, AZ

"I have been pushing your products since i have used them and am convinced that it is god in a bottle.IT performs miracles.I just put Blue Devil in my corvette where i was losing a gallon of coolant in 70 miles.Within 5 minutes it was healed.Before i am done i'm sure i'll have all your products in my car.Follow directions and it works. "
Brian Lane - Charlotte, N.C

"I used the Head Gasket Sealant about 3 weeks ago. Carefully followed all directions. I am very pleased that the car is running beautifully. The engine has GREAT power and no white smoke. The car has been driven approximately 200 miles. Question: How many miles must I put on my car before I drain the radiator, put in antifreeze and replace thermastat? Thank you so very much for saving my car!! " - Tara Webb - Durham, NC

"I followed the instructions for the head gasket sealant and it worked ($60.00). I previously changed the head gasket and water pump, and other relative gaskets needed, dropped the oil pan and checked the seals on the piston sleeves. No sign anywhere of a crack or leak so I figured it must have been the head gasket leaking water into the oil somehow. Well, even after all this effort I gained almost ½ a quart of water in the oil in about 10 minutes of running the tractor up and down hill. (1954 Farmall 230) So I tried this stuff I have run it with a 5’ bush hog at ¾ throttle for over 2 hours and the engine oil is clear. " - Bob Warnock - Avon, ME

"I used the head gasket and block sealer in a 3.8 engine and it's still not filling the crankcase with coolant. I can't believe how good it worked for a friend's engine. Thanks. 9/21/2010"

" I just wanted to email you and let you know that the BlueDevil product is moving well. I am having good success in introducing it into the shops I call on. I have learned a lot after talking to my customers about "real world problems" they face in the shops. I have encountered every other type of competitive product out there you can imagine, and even though that may seem initially as a detriment, it is actually a positive because it means this customer is prone to using a product such as ours. I listen to my customer tell me how the competitive product works and then I ask some some follow up questions, such as : Is this product you are using a "permanent repair" ? or are you afraid that a product with solids in it might plug up a radiator or heater core ? I then ask them if there ever was a repair that they were not able to fix using the product they have. After all of this then I talk a little about our BlueDevil product and relate "real world fixes" that other customers who have already used BlueDevil have told me worked. I tell them that a shop I called on used BlueDevil to repair a leaky intake manifold on a 5.3L GM product in the passenger side back corner. Another shop told me that after a Chrysler product came in for a routine coolant flush, a leak developed while in his care from a freeze plug located between the engine and transmission. He did not want to tear half the car apart to fix the freeze plug, and not get paid for it. He instead decided to try our BlueDevil and sure enough after following the directions on the label it worked perfectly, and saved him from a time consuming repair. The best on of all though was a customer who had a 1998 Buick with a head gasket leak between cylinder #1 and #2, that was so bad the engine was hydraulically locked up. He removed the spark plug in cylinder #2 and pumped the coolant out of it. Then he drained down the radiator and pulled the thermostat. The reason he drained the radiator almost all the way down before starting the engine was because the leak was so bad in cylinder #2, that this was the only way he could get the engine running without hydraulically locking it up. He then ( with great skepticism I might add ) used the BlueDevil product as per label instructions. After 50 minutes of run time he shut it down, and reinstalled the thermostat. He then let the entire thing cool down overnight. The next morning they pressure tested the leak, and it was holding pressure. He could not believe it, and was extremely pleased with the results. Not that this was a hard car to do a head gasket job on, but the customer who owned the car was not going to repair the car the mechanical way. I must say that telling these success stories over and over to potential customers has provided the push necessary for them to say yes to my sales offer. You must get comfortable with the proven results, and learn the competition. I never knock the competition in any way. I only tell my customer about how my product is a superior grade permanent repair, and one they can trust and count on by relating true real world testimonials that I have learned along the way. This product belongs in every one of the shops we call on. Thank" Ed Niccum - Carquest

"I love BlueDevil!!! I was just quoted $1100, 1200 and 1300 to replace the head gasket in my 95 Saab 900SE Turbo.. The vehicle would be worth the investment but i don't have the money! I went and got a bottle of BlueDevil for $65.00 and followed the directions and after 1 hour then driving 25 miles and looking at the exhaust there was NO SIGN of smoke AT ALL!!! PLUS... I lost not a drop of coolant and the car ran smooth and quiet!!! THANK YOU! THANK YOU!! > YOU just saved me $1000.00! I will keep your product in mind whenever someone needs a sealer product, I WILL DEFINATLY RECOMMEND BlueDevil and your other products! You have a 100% Satisfied customer... Thanks, Sincerely, Brad Shatuck" Brad Shatuck - Fremont NH

"Hello, I would just like to tell you the ammount of positive feedback I get from your BlueDevil sealant. I work at an auto parts store and have sold the other brands with not as high views as yours. I have been told it is worth every penny you spend. " Chip Read - Auto Parts in Princeton, IL

"As I've mentioned in my comments on YouTube I am completely satisfied with the product and the resulting repair and will continue to speak of it in a positive manner.With the onset of cooler weather (8 deg. F this morning) this will now become a daily driver that I will use with confidence.Again thanks for making a product that delivered on its' claims. Good luck with sales and marketing,I think you're making progress in dispelling the old myths and claims of the old "repair in a bottle" products.Wishing you and your family a happy and healthy Holiday and New Year and continued success with your USA Sealant line of products. " - Michael S. Struwas

" I used this product 2 days before Christmas. Our car broke down 350 miles into trip. About an hour after using your product, we were back on the road to visit family which was still 1450 miles away and we arrived safe and with no other problems. Thank you for helping me and my family. You guys saved our holiday trip and I will tell everybody I know about your product and what it has done for us. Thanks again, Rich Brumale " Rich Brumale - Sugarland, TX

"Merry Christmas to you and your staff. A satisfied customer. God Bless You. "
Alfred W. Sommerfeld - USAF RET

"I've used BlueDevil and have recommended it to others. I'd call it Great Stuff, but the name is already taken. LOL Sincerely." - Lee Conway - Archdale, NC

"Thank you Universal Products, used your BlueDevil on 174K mi Chevy Lumina. You are definitely a working man's company, not much money to spend these days and car is running fine after 500 mi. I'm about to buy Oil Leak and AC products to see if you can work some magic on same car. I truly appreciate the products you produce and what you mean to those of us who struggle financially with automotive woes. You've saved me $1100 so far. 2.9.11" - Kirk Mattioda - Fairview Heights, IL

"2.18.11, My 99 Dodge intrepid was spurting water out of the tail pipe and blowing smoke. After having bluedevil in for a little over a week now the check engine light has turned off. I ant blowing smoke and neither is my car now. Thanks a million or a at least a thousand to be exact " - James - Kihei, HI

"2.21.11, I just wanted to write. I bought the 32 oq head gasket sealer. GREAT PRODUCT! I was blowing white smoke out my exhaust. about 3 gallons of anti-freeze a day 60 miles a day driving is very pricy.my motor would miss and hydraulic a cylinder at times. its been about a week and a half with you product. so far my engine back to normal. I used fast flush before using your product. (I had two bottles of bar's leak in my system trying to stop the leak. (failed) I followed the directions replaced the thermostat too. I'm really pleased! I was close to scraping the 1995 Dodge Voyager, you bought me some time. I would never spent the money if my son hadn't told me he had seen it work before. I wish I taken his word for your product weeks before I tried it. I tell everyone, when it comes up. Randy "Randy -Clymer, NY

"3.14.11, This was my 4th time with bluedevil sealant and I have to tell you, your product is the best i've ever used hands down!!! Where have you guys been, you have any idea how many of my cars you could have saved! I can't say enough about your sealant! Thanks, Rob. "Robert - Castaic, CA


"Good stuff. Another of your satisfied customers used the block sealer for his truck and so far, no leaks! " rhagan4@cox.net - 7/1/11

"It's been a little over 10 days since using your product.I Have not lost a drop of coolant. I was using a gallon every 50 miles or so or so.I was at the point I had nothing to lose, so I tried it and I am very happy with the results. Knocking on wood." - Ronnie Nivison - 7/2/11

"I wanted to write in and let you know how amazing your BlueDevil Head Gasket Sealant is. I bought a 1998 Cadillac Deville and immediately after buying it the damned thing started overheating. We took it to a local shop and were told since it had a Northstar engine it would be very expensive to repair. It turns out the head gaskets were bad. The cost of the repairs was going to be 2,500.00 to 3,000.00. Times are tought for us right now and we couldn't even come close to being able to pay for the repair. Needless to say the car sat in my front yard for weeks. At our local Autozone I was told about your product. I was extremely skeptical but spent what I thought was an absurd amount of money for your product. I was wrong. It fixed the car and we've deiven it at least 500 miles so far with no problems. Your product saved me over 2,500.00 and I wanted to take the time to say thank you. I really needed a break. " - Casey Harper - Plainview, TX; 9.6.11

"A big thank you for your superior product, BLUEDEVIL head gasket sealer. It saved me from a large expense on my personal Cadillac Brougham 5.7 with over 270K miles The car overheated and blew the left-bank head gasket. After installing your product, I have driven the car over 2K miles including a round trip to Yorktown, VA (425 miles one way in five and a half hours each way. You do the math!) I can not say enough about the integrity of your product. " - Herb Brantley - 7.8.12