Bar's Leaks Liquid Copper Coolant Leak Fix Sealant, 18 oz

Did exactly what it said it would do and it worked. It sealed up a cracked head gasket and it is no longer leaking fluids. Car is no longer getting hot and it runs fine. Definitely worked and it was cheap. Do research before you use this as I've heard it CAN lock up certain engines, but for my Chevy 2002 Malibu it worked fine. Great purchase.

I replaced my water pump, and much to my dismay found another leak somewhere behind and below the pump. I was afraid that the head gasket might be leaking, and used Bar's liquid copper to try and abate the leak. I also removed the thermostat so that this product did not clog it up. This stuff worked great! I have put many miles on the truck without incident....I would recommend using this product should you not want to invest in having head gaskets replaced.

[This review was collected as part of a promotion.] I was just going to replace my radiator. I couldn't see the leak but radiator was empt everyday. I figured I'd give it a shot . I havent lost a drop since then and its been a couple months and probably 1000 miles

I was stuck in the middle of nowhere when apparently my radiator cracked. I put enough water in it that I was able to make it to the next town which was Walnut Mississippi. They have a young woman working there named Gracie who is absolutely phenomenal. She picked out the product for me and said she thought it was my best bet, I used it completely and after adding enough water to get it working, the leak stopped and I haven't had to worry about it since. Great product absolutely recommend

Fast and easy service. Very good customer service.

best stuff ever made. It did the trick of plugging intake manifold leaks on two of my trucks!! It was unreal how well it worked. Internal coolant loss is hard to diagnose, but once known where the leak might be, it should be used first and foremost for less than $10. A complete tear down is thousands of dollars!

I purchased this after having a slow coolant leak in my car for a couple of weeks. The instructions were easy to follow and within a couple of hours I could definitely tell that my coolant leak was fixed. It's been a couple of weeks now and my car is still working fine, and no longer leaking coolant and overheating.

[This review was collected as part of a promotion.] This stuff save my butt from being stranded in the backcountry in the middle of nowhere this summer. My grandfather swore by this brand and now I can see why one bottle in the radiator sealed up the half dozen pinhole leaks I got bushwacking down blm "roads"

First of all, the delivery was a day late and a dollar short. Should have drained some coolant from the radiator before pouring the stop leak in but believe the freeze plug leak was too severe for this stuff to do its magic. Had to replace the freeze plug to seal the leak.

I put it in my coolant reservoir like stated because my radiator isn't one that has a cap and it didn't go through the system just stayed in my reservoir