"Guys, Not having anything to lose and everything to gain I used Blue Devil. 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 Blue Devil 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

"Blue Devil 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

"Blue Devil 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

"Blue Devil 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 Blue Devil, worked great!! "
William - Alto, MI

"Just thought I'd drop a note of my experience with Blue Devil 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"
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"
rhagan4@cox.net -

" I just wanted to email you and let you know that the Blue Devil 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 Blue Devil product and relate "real world fixes" that other customers who have already used Blue Devil have told me worked. I tell them that a shop I called on used Blue Devil 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 Blue Devil 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 Blue Devil 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. Thanks Ed Niccum "
Ed Niccum - Carquest

"I love Blue Devil!!! 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 Blue Devil 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 Blue Devil and your other products! You have a 100% Satisfied customer... Thanks, Sincerely, Brad Shatuck, Fremont NH "
Brad Shatuck - Fremont NH

" Hello, I would just like to tell you the ammount of positive feedback I get from your Blue Devil 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 Blue Devil 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 Blue Devil 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 blue devil 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 Wilkes - 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 Johnson - Clymer, NY

"3.14.11, This was my 4th time with blue devil 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 Sumner - 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 Blue Devil 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

"1.23.12 I would like to tell you how great your product is. My 2003 Nissan Altima had a blown head gasket. I'am not really in a position to purchase a new car or sink a couple of thousands of dollars into it. A friend of mine recommended your product, so I decided to buy it. I let my local mechanic follow the instructions on the bottle. Guess what ?? The engine light went off, the heater finally works and it's not running hot. He is more amazed than I'am. Thank you !!! "
Jeff Holland - Derwood, MD

"Fantastic products! I know the product is not recommended for NorthStar Engines. But, I have used the Blue Devil on my NorthStar engine & it has been running great with no leaks. I have friends that have used it on their NorthStar engines as well. Since it is a low flow system, just add pressure to the radiator, & you should get the results you are looking for with the leak."

Robert - Middleberg, FL

"Blue Devil is a miracle Worker! My vehicle was shaking like crazy with steam & water pouring out of the exhaust. Didn't think it would work, but it did! "

Tim - Newport News, VA

"Blue Devil Pour-n-Go works 90% of the time for my friends and me as of 1/13/2010. The sales guy at Advanced Auto Parts who sold Blue Devil to me swears that this is the best stuff on the market for sealing a head gasket leak! "

Jimmy - Waycross, GA

"Blue Devil Pour-N-Go 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

"I had a customer with a Ford tractor with leaking sleeves around the engine. He did not want to tear his engine down so I said, "Pour this Blue Devil in it". Success! He was very happy! Knock on wood, I have had the same success with every one of my customers. I haven't seen any stop leak do what Blue Devil does - meaning it actually cures every problem it says it will cure. The price scares my customers initially, but when they weigh all factors, they use it and are happy they did! I haven't had one return."

Frankie - Robertsdale Auto Parts, AL

"This stuff really works!! I didn't think my A/C unit would ever work again and after following the simple steps on the bottle I had ice cold air flowing through my car!"

Mike - GT Auto Parts

"I would be happy to give you a testimonial on Red Angel. I love the product, its great stuff"

Dan - Milwaukee, WI

"I have used the Red Angel product on over 10 vehicles, all of which were successful. Great product!"

Chris - Tyler, TX

"I have been putting Red Angel in my customers cars with a lot of miles that leak slowly and it has worked great! What a great product!! "

Jackie West - Potts Camp, MS

"Red Angel saved me from a hot summer! Thank you, thank you, thank you!! I would recommend this product to anyone."

Cindy - Aiken, SC

"I own a 98 Intrepid that I had to recharge the a/c after the last 2 winters due to an Evaporator leak. I added the aerosol red angel stop leak to my system last spring . After this winter the a/c is blowing cold the first time I used it.Thanks USA Sealants for a job well done !"

David Wisniewski - West Allis, WI

"I spoke to you about options for keeping the air conditioning system going in a couple of my older vehicles, both of which have slow leaks in their systems. You recommended a relatively new product called "Red Angel A/C Stop Leak". Although a little pricy I decided to try it on my 93 suburban. After having my local A/C shop top up my truck's system with fresh refrigerant I added a can of the Red Angel product and crossed my fingers. I'm happy to say that the product seems to have worked since the A/C system worked flawlessly throughout the summer and fall. In the past, the system would only cool for a month or so and then require more refrigerant to keep on working. Pleased with the apparent success, I ran the same process on my wife's old but trusty (she won't let me get rid of it!) 85 4x4 Toyota wagon in early June with the same results. The A/C system in her car ran just fine throughout the summer-fall cooling season. Thus, I'm very pleased with the product and the excellent results, not to mention the cost savings over the cost of constantly adding refrigerant. At the age of these two vehicles it isn't an option to have the system properly repaired . Thanks much for the excellent advice. "

Roy Steinbrecher -

"The Red Angel product is great! It fixed my air conditioner and saved me a bundle of money!"

Carl - Horseheads, NY

"Finally a good A/C stop leak that doesn't hurt or clog the recovery machine. "

Barbara - Tampa, FL

"I am an A/C shop owner and have had great success with your product. We use it on all of our jobs!"

Dennis - St. Petersburg, FL

"I have used the Red Angel product on over 10 vehicles, all of which were successful. Great product!"

Chris - Tyler, TX

"This stuff really works!! I didn't think my A/C unit would ever work again and after following the simple steps on the can I had ice cold air flowing through my car! "

Mike - GT Auto Parts

"I have used White Shepherd on transmission, oil, and rear main seal leaks with complete success! The six cars I have put the product into have only come back for scheduled maintenance and are still running strong with no leaks. I recommend it to everyone! "

Lonnie - Red Nelsons Garage

"I used White Shepherd in my van which has 130,000 miles on it - and I saved $1,000 - that was the quote for replacing all the seals. I am stunned at how effective it is! Zero leaks! Your product is great!"

Gary - Woodruff, SC

"My 1949 tractor was leaking oil considerably. After using White Shepherd, my leak stopped completely and my tractor is running better than it ever has! "

Mark - Camden, AR

"White Shepherd has put my Acura Legend back on the road for less cost than a tank of gas! After using synthetic oil for ten years, so many of the gaskets and seals had started leaking that the repair estimates approached $1,000.00. I put White Shepherd and fresh oil in last Sunday and drove it for 3 hours, then all week, and have not seen, or smelled, any oil leaking at all! I am very impressed, and grateful. Thank you for a great product. "

Chris Muscarella - Palm City, Florida

"I just wanted to offer my thanks to your team once again for the unrivaled products you offer in the automotive "stop leak" realm. After finding success in using the trans sealer in my truck a couple years ago, I thought only of White Shepherd a week ago, when my engine exhibited a small oil leak underneath the pan. I take great pride in maintaining my (2) vehicles for looks and performance - and both have over 130k miles on them, (being 12 and 14 yrs. old). My truck is set up for performance and employs some modifications including a supercharger. I do not tolerate burning or leaking fluids, and keep a close eye on my garage floor for early detection. When the first drops appeared a couple weeks ago I was disappointed, but knew what my first reaction was going to be. Driving only (1) day, (about 50 miles) after adding your engine "oil stop leak" product, the leak was completely sealed. I was unable to determine which seal was leaking in my previous inspection due to the limited view available from most vantage points. But the beauty is, It doesn't seem to matter! I carefully cleaned the areas where the oil had run down and my engine and concrete have both remained clean ever since. I would like to also thank your tech staff who answered a question I submitted online by calling me on my cell phone. It is such an incredible product that let's you avoid literally hundreds of dollars and/or worse: extended down time - all by just pouring in a $20 bottle of White Shepherd. I don't take that for granted. Thank you! "

Mark Joy - Lusby, MD

"4.5.11, I have a 2001 BMW X5 which developed a serious oil leak (everytime I stopped, there was a spot). I put a bottle of White Shepard in the oil and after a couple of days of driving, the oil leak was gone except for a small drop here or there. I put in another bottle and after driving for a 3 hrs, not a drop no where. The truck seems to be driving much better also, had white smoke out the back, now no more smoke. I am so pleased with this product, it really works. I'm telling everyone I can about it!! Thank You for producing this product... "

TC Campbell - Winnetka, CA

"I saved my customer over $750 on his rear main seal leak with the White Shepherd and have only seen him twice for his annual oil changes, the truck is running great!"

Harry - Flint, MI

"My rear main seal was leaking slowly and I could not afford the $1,000 quote that my mechanic gave me to fix it, white shepherd save me $980 and I have been driving the vehicle for 5,000 miles without a drip, thanks for such a great product!"

Bill - Buffalo, NY

"If you are in the beginning stages of a transmission leak this product will not only cure the problem but has proven to be a permanent stop to the leak, my car is living proof of that!"

Roger - Anapolis, MD

"I have gone three for three on fixing rear main seals leaks with your product, each bottle fixed a different car, I don't know how this secret has been so well kept but I'm telling everyone I see to try it out! "

Ron - Melissa, TX

"My name is Brad and I'm an ASE Certified mechanic. I bought your White Shepherd Rear Main Sealer about a month ago. I poured about half of the bottle in my in-laws' 95 Dodge Neon that leaked about 2 quarts of oil every 3-5 days from the rear seal. About 3 days into adding it I noticed the leak slowing. By the end of the first week the leak has completely stopped! That was 3 weeks ago. I'm very impressed with this product and will recommend it to anyone that can't afford to fix it! Thanks again you guys saved me about 7-10 hours worth of labor! "

Brad Ferrier - Clearwater, FL

"3/3/11 I must say, your rear main seal worked for me. I found you on line and in that moment felt some hope. I am a mail carrier and drive a 1995 jeep, which had developed a pretty bad oil leak. I narrowed it down to a leaking rear main seal. Desperately needing a miracle, I ordered your product. It took a couple of days, and I actually did a second treatment. Wow, the leak is gone like magic. I have already told others about your products.Your product fixed my problem; with the extreme driving I have to do each day, it's a perfect solution for any normal driving use. "

Randy Vickrey - USPS mail carrier

"Your Message: Folks if you've ever thought testamonials were fake, think again. I recently commented on Blue Devil Gasket sealer and I'm about to on the White Shepherd Rear Main Sealer. I'm a 24 yr AF Vet who really does live in Fairview Hts, IL and struggles like most to keep older vehicles driveable. USA Sealants you've done it again! 6 weeks after using Blue Devil Gasket Sealer for coolant leak, my 174K mi Lumina had simultaneously been leaking oil so I tried your Rear Main Sealer in oil... "BAM" 2 weeks later and oil dipstick has not moved from "full" mark! I don't know what your chemical engineers are doing, but don't let them change the recipe. By the way, 3 months prior to this I tried using STP Oil Stop Leak, even tried a second can a month later...wow, that was a waste of money. USA Sealants I want to personally thank you for the money you have saved me...and with economic situation the way it is...you guys have been a savior. Folks, their products REALLY DO WORK! "

Kirk Mattioda - Fairview Hts, IL

" I love White Shepherd and can't keep it in stock! "

Wes Pittman - Pittman Automotive

"This was the easiest fix I have ever encountered, I just poured this white shepherd into my transmission fluid and two days later my leak stopped, I recommend this to everyone!"

Michael - Tyler, TX

"Your White Shepherd transmission sealer kept my Ford Pinto on the road! I have had this car forever and although some consider it to be worthless it holds a certain value to me, my transmission started to leak just over a month ago, my local NAPA representative advised me to try white shepherd out, after driving my car for the weekend the leak was non-existent, thank you!"

Rob - Fairfax, VA

"If you are in the beginning stages of a transmission leak this product will not only cure the problem but has proven to be a permanent stop to the leak, my car is living proof of that! "

Paul - Athens, GA

"I don’t believe in a mechanic in a bottle. As a last resort I used this product on a leaking hydraulic lift. Much to my surprise I have not seen a drop of fluid in over a year."

Ronald - Bastrop, TX

"This product works. I have repaired several leaking wreckers in our fleet with this product, saving me money and time. Thank You"

Tony G - Charlotte NC

"Seen the White Shepherd Hydraulic Stop leak work on everything from heavy machinery, lifts, hydraulic seals, and even leaking convertible tops."

Mike - West Memphis AR

"I have saved a lot of money on hydraulic fluid in the last two years thanks to White Shepherd."

Dallas - Naples FL

"What a product! The White Sheppard products are amazing. It helped stop my power steering from leaking on my 1998 Land Rover Discovery. White Sheppard 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 -

"I feel safe again driving my Ford F-150 now that my power steering works again, I had been losing fluid slowly but after adding the white shepherd to the system it ended up saving me $450 on my vehicle! "

Ryan - Tryon, NC

"My power steering system is saved! No more annoying noise when I turn the wheel, your product not only saved me a ton of money but a daily headache from driving around in it, thank you!"

John - Kaolin, AL

"I had a stiff steering rack on my 1984 Saab 900 (485,000 kms ) in exactly 2 mins the steering felt a lot looser and worked quite well. I recommend the product. "

Charlie - Toronto, Canada

"I have a Toyota land cruiser with 150,150 miles on it and the power steering box had a leak, dripping on the frame collecting dirt etc... if you know land cruisers, parts are few and far between and expensive, so I debated to purchase a new steering box, then saw your power steering stop leak and gave it a try WOW!! No leaks at the steering box, saved a hand full of money and the steering is smoother . Thanks"

Carl - Manadahill, PA