Pelletized Heavy Duty Stop Leak (PLT11)

My wife has a 1979 Town and Country woodie wagon and loves it. It developed a small leak in the thermostat housing due to corrosion. I replaced the gasket, but it still was seeping a little bit. I poured a bottle of the pelletized formula in the radiator and it immediately stopped leaking. Thank you for saving me from having to do more work.

Thanks for your feedback, Denny!

I used this stuff because I had a chunk of gasket blow out from my water pump and the piece that blew out was big enough to slip a dime inside there. So I was very skeptical on whether or not this stuff would work because I've never had any other stop leak product work for me...and I'm completely shocked because it completely worked, not a single drip came out and it's still holding today. I would just like to say that Bar's Leaks, you are awesome, your products are awesome, and I will recommend them to everyone I know. Thanks again because I really did not want to have to put a new gasket on that water pump.

My 2013 Chevy Malibu's water pump started leaking. I went online and your products came up. I bought two of your stop leak products. One was $3.89 the other $8.89 at Walmart. I did not have much room in my radiator so I used the smaller one with the pellets. I have the larger one in my trunk for further use. I am on day five and no leaking. My mechanic says a new water pump will be almost $700. I am 82 years old on a fixed income and your product just saved me $700. Thanks again.

I had a radiator leak and knew from past experience to get some Bar’s Leaks Heavy Duty Radiator Stop Leak PLT11. It worked perfectly the first time just like before.

I started using Bar’s Leaks when I was young. I am 63 years old. I used to use it in my radiator. It really worked. My car was old but it kept going for about 6 months until I got it fixed. I would recommend the Radiator Stop Leak PLT11 to anyone.

I had a 2012 BMW X5 that had a coolant leak. I was in a bind – I had to take a family member to the hospital which was a couple of hours away and did NOT have time to take the car in first, but what to do? I called a friend who recommended your Pelletized Heavy Duty Stop Leak (PLT11).  I was skeptical at first – would it harm my engine? Would it work? I found it easily at my local auto parts store and bought it. It was easy to use, the directions were clear, I applied it and waited . . . then drove. It worked like magic. We got to the hospital without incident, and to be honest, I actually waited a few weeks before I took it in because the product worked so well that it was no longer an emergency. I was floored that it really did what it said it would and did not seem to harm my car at all! Thank you!

Had a leak in radiator and Bar's Leaks PLT11 pelletized stop leak product fixed the leak first time. 

Thanks for a great product guys.

I used Bar’s Leaks Radiator Stop Leak PLT11 on my '71 Mercury Cougar GT. Worked flawlessly as did all the Bar's Leaks products I've used over the years.    

My take on Bar's Leaks Pelletized Heavy Duty Stop Leak (PLT11) 🔽

For our old inherited ‘56 Chevy, it stopped the radiator from leaking so the engine would not overheat anymore, like it used to with a slight leak. No worries after using it so we could drive anywhere. Great stuff.

This review is for Bar’s Leaks Pelletized Radiator Heavy Duty Stop Leak, part #PLT11.

Product came in clutch to save the day when I needed it the most. April 27th ‘95 my son was born. I was heading to the hospital to take him and my wife home. Car cabin of that '83 Mercury Marquis filled with the familiar sweet smell. My heater core sprung a leak. I ran into Pep Boys and picked up a bottle of Bar’s Leaks Pelletized Radiator Heavy Duty Stop Leak poured it in the radiator soon the leak was stopped and I could get my family home safely. 

Product held wonderfully.   I replaced the core two weeks later.