Radiator Stop Leak 2X Concentrate, 6 oz.

Had tiny Head gasket leak. white vapor coming out tailpipe. Put a half can of Bar's Leaks Radiator Stop Leak 2X Concentrate in with 50/50 antifreeze. in the last 12 months put a half cup of antifreeze in the expansion tank. 1999 Ford Ranger 4.0L V6 4x4. 200,000 miles. Texas.

Blew a hose on my police interceptor. Lots of fluid went everywhere. Replaced the hose, but still getting white smoke out of the exhaust and loss of power. Added this, and in no time? No more smoke. Still working on regaining the power, since so much fluid wound up sucked into the engine, but it's getting better! Managed 110mph the other day with no issues - just took a little bit longer to get there, and the leak is GONE!! I highly recommend this.

My Jimmy had a busted radiator and 1-2k to fix it was not worth it. This product worked to stop it but it's not a permanent fix and will wear out with use. If you're trying to get it home or to a shop, it works great. 100 miles no problem. But it will eventually wear out (especially with larger leaks).

I have a small waterfall and pond. The little pond has been leaking. I tried 'Fix a Leak Pool Leak' which is meant to for pools and spas (and cost about seven times as much as this stuff) with no success in sealing the leak after using the entire bottle (supposed to be able to treat 1000 gallons) over multiple applications. Thinking outside the box, I thought I'd give this stuff a shot. I bought four 6oz bottles. After the third bottle (dumping in a bottle every other day) my leak appears to have stopped. If I ever do develop a leak in the cooling system in my Jeep I'll be sure to give Bar's a shot. Bar's will be my first product choice for any other leaks as well.

Bought this to temporarily seal a coolant crossover tube on a Honda Pilot. The leak wasn't bad... Maybe a quart of coolant every 2 days. This sealed the leak for all of a day. 1 trip back and fourth to work the started leaking again. But WORSE.

I had a leak and was told by my mechanic that I probley had a cracked head on my car. I tried bars leak first as my car still has a lot of life in it. Bars leak stopped my leak right away. I used it per directions on the bottle. And 2 months later still no leaks! I will buy again if I ever need to.

Works well at sealing holes the size of your heater core that is...Now, how to get it out without replacing the core?

Had a small leak that was not visible on my car. I did a full flush, and was careful to get all of the air out of the system. Since using I have not had any problems with my car. I think the main reason peoples radiators/heater cores get clogged is there is an air bubble in the system. When the stop leak hits the air bubble it acts like it is a leak and it hardens. If you are going to ise this product be very careful to properly bled of air.

They really stop the leak amazing product

Product worked as stated . I got what I paid for . Satisfied

Did not do what is is designed to do for me. However may work for someone else.

Great for minor radiator leaks

Small leak in a heater core of 79 chev 1 bottle fixed it so far great product