Blue Magic1116 Liquid Glass Metallic Seal-Up - 22.8 oz.

We had a leak in the front of the motor and tried two other coolant sealants that were highly recommended and neither of them worked. Someone told me about this stuff so I figured it couldn’t hurt to try it and sure enough. It sealed the leak and the car drove like new. Highly recommend!!

If you follow the directions to the letter it works!! Sealed my head gasket leak on a 99 Accord. My rough idle went away and misfires. The subframe rusted through before the head gasket sealer stopped working. I would buy this again and again. Excellent bandaid.

Be sure to follow the instructions. It’s used it a while ago and it has helped for sure. I do hope that it keeps it up.

Got the job done and great value... sealed the head gaskets...car is running Smoothly better than before...my 92 year old told me about it he used it for many years when he worked on his cars... highly Recommend it

The product works as it should this is not my first time recommending it to people, but to my surprise when I opened the package some spilled from bag down the front of my hoodie! After inspecting the bottle I noticed a crack on the bottom. On top of that ups was having issues trying to figure out how to ship package as it was 4 days late!! But I don’t blame the seller for the broken bottle could have happened at any time, but dam UPS, my stuff shows up late and broken, y’all should try harder

I have mixed feelings about this product. My tractor engine was overheating due to water loss and making a lot of noise. After using this sealant, the noise significantly reduced, which was a great improvement. However, the engine still overheats and continues to lose water. I'm not sure if it's due to the product or if my engine’s condition was just too far gone.For the price, it's definitely worth trying if you're facing similar issues, but keep in mind that it might not solve all problems.

I have a 2000 3.0 liter V6 Ford Ranger. Dealt with a cylinder 6 misfire for years intermittently. Of course I started throwing parts at it. Coil pack, spark plug, spark plugs wires, fuel injectors. Nothing worked. Finally noticed a color difference on cylinder 6 spark plug. Coolant leaking. Tried Blue Devil, worked for a day, clogged radiator. YES my coolant was clean because I know someone will say that. This stuff requires that you flush the coolant system until it runs clear water. Read the review from ArtS. That is a God send. My radiator drain wasn't working, so I had to disconnect my lower radiator hose each flush. Took 6 times to get the coolant flushed. Bottom line, put in the work and this stuff will work. I have been running for 1.5 months so far. Caution: check your engine oil first. If it looks like a milkshake, your head gasket is too far gone. Either replace the head gasket or get a new car.Also, be smarter than me. Make sure your heat is on when running the truck so you don't have to flush as much me.Good Luck!!!!

It did work, but for about 3 weeks, then the problems started again.Personally, I'd say this will work in a pinch if you need to use your vehicle until either you get the problem actually fixed, or take a chance if it'll stay fixed for a longer while. Either way, don't expect it to permanently fix your problem.