5stars
62ratings4stars
14ratings3stars
4ratings2stars
5ratings1star
12ratings
Would recommend80% agree
Good value85% agree
Good quality80% agree
87 Reviews
Leaky head
I have used the product before had good luck with it I hope this works as well it's going in my motorcycle the rear head leaked it only has 3,300 Mi on it I have not found how much to use on a 2 quart system thoughRead full review...
Verified purchase: Yes | Condition: new | Sold by: epjohnson78
" Hey, who's the wise-guy who put cement in my cars radiator?"
I honestly do not take any delight in giving a bad rating on any product.., but as long as we are relating to the subject of honesty, this product nearly destroyed my cars engine! I only had a minute leak, and even though I followed the the directions perfectly it clogged up the system so bad my cars engine almost exploded! I would never use this product again, nor would I recommend it. I do recommend K-Seal as I believe it is the best product on the market right now, even better than the over-rated and over priced Steel Seal. As I stated above I don't like to give bad ratings, and sometimes the truth hurts.., sorry, just being honest. Thank You.Read full review...
Verified purchase: Yes | Condition: new | Sold by: unknown_user
This Blue Devil does work
Just not this particular size of bottle even though it was recommend for 4-6cyl cars it only work about 10mins after driving it when done following instructions. I have used the more expensive bottle which is twice the size and has a yellow label instead of white it worked excellent for about a month then it had a thermostat housing leak and my husband over heated it and blew the seal again I was just hoping I could save sum money and get the same results but you get what u pay for so get the the more expensive stuff. Read full review...
Verified purchase: Yes | Condition: new | Sold by: iceautoparts
Not good for freeze plug leak as claimed.
This product has claimed to work on leaking freeze plug. It does not. It says it works as a blocking agent once it hits the air through the leak from hot to cold. It did no such thing. I basicly sat there and poured 30+ dollars of a blue liquid into my radiator and watched come right back out of the leaking freeze plug. Absolute garbage. Dont use on freeze plug. As to weather or not it works on head gasket i dont know. But for blue devil to he all over the web claiming to work on leaking freeze plug is a sham.Read full review...
Verified purchase: Yes | Condition: new | Sold by: hora.denni
Blue devil pour n go
Seems to have work but I flushed my system 4 times with water then with chemical flush then water again then the blue devil in water. This product takes a full day to do properly. Don’t rush and it will do the trick.Read full review...
Verified purchase: Yes | Condition: new | Sold by: readit4fun
Great product! Works great! Saved me hundreds of dollars!
I was skeptical about a "repair in a bottle" after being told my engine would have to come apart to install a new head gasket. The cost estimate was between $600-$1,000! Follow the directions on the bottle and you will be impressed too! Do not take any short cuts. Its been several weeks since using this product and it has worked as promised. I will recommend this product to anyone who has a similiar problem.Read full review...
Verified purchase: Yes | Condition: new | Sold by: iceautoparts
Impressive
I am impressed with how well this product works. This is essentially glue, when animated in water it wont stick, but once some leaks past head gasket, then you turn motor off, the HEAT from the block cooks the glue, cures it! A little at a time it will totally re-glue the gasket down. You got to run the motor to full heat, then let it fully cool down. Run again, 20 minutes, full heat, then cool fully down. 5 Hot/Cold cycles is all it took to seal my head gasket again! 20 minutes per cycle is all it takes. They say to flush the cooling system, but I just poured it in ... Pour and Go!Read full review...
Verified purchase: Yes | Condition: new | Sold by: uag1mx
My car has run perfectly ever since I added the Blue Devil head gasket sealer.
I have a 2007 Chevy Cobalt that has had so many issues lately it was nice for once to have an easy and inexpensive fix which is exactly what Blue Devil provided me. All I did was pour it into the radiator hose and it did the rest. My car was up and running within an hour. Amazing.Read full review...
Verified purchase: Yes | Condition: new | Sold by: tosongdanglee
excellent product
I have used this blue devil head gasket. sealer in the past and I have achieved.
better results than using KW fiber lock. so, for me it is a really good product. if you do it right by flushing your radiator and engine first to clear any dirt or debris from the cooling system. it worked every time. Read full review...
Verified purchase: Yes | Condition: new | Sold by: epjohnson78
Saved my Cadillac
My 2004 Cadillac XLR was burning coolant.
Used Blue Devil and saved myself over $3000 for a head gasket repair.
Yep, best stuff I’ve ever used and I recommend it to anyone with a head gasket problem.
Just make sure you follow the instructions exactly how they tell you.Read full review...
Verified purchase: Yes | Condition: new | Sold by: BVQooTOcSZq@Del...