Blue Magic 1116 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!!

Followed instructions and it worked on cracked cylinder head. I was sceptical but I worked as described.

So far so good

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.

This is a quality product for small leaks, unfortunately, my head gasket leak was too large for it to work.

No luck wasn’t able to seal small leak. Was able to get it done with a large dose of sodium silicate concrete sealer after flushing again. Probably 2.5 of these bottles is the dose I used of concrete sealer. Maybe a 2nd or 3rd bottle would have been enough. Not a fan of flakes in every sealer product either.

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 had a horrible block leak (Losing a gallon an hour roughly and steaming like crazy out the exhaust) and had quoted 4k dollar engine swaps. I tried this and a "less be-all-end-all" product to fix my truck. The K-Seal product didn't really seem to seal it up. I dumped a bottle of this in and it has seemed to do the trick. Around the 18 minute mark of the 20 minute bake time that it calls for i think it locked up my thermostat and the engine began getting dangerously hot like the thermostat wasn't opening up, so you may want to keep an eye and keep a replacement thermostat on hand if you're using this product. Following the instructions and replacing the thermostat after observing that behaviour this 4.7L Tundra Motor with 300K+ miles is back in action.

I used it +20 years ago & I’m using it again that means it’s working.