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Your cart is empty.We all love using our tablets these days — reading, gaming, surfing the web, you name it! Unfortunately, that kind of tablet won’t be able to fix your leaky radiator. Like so many of the parts on your vehicle, your radiator needs regular maintenance to remain in tip-top condition. When you need radiator leak repair, you may be picturing a time-consuming and expensive trip to the mechanic. But, with Bar’s Leaks, that doesn’t have to be your reality when searching to repair a radiator leak. Our product engineers created these Bar’s Leaks Radiator Stop Leak Tablets to repair radiator leaks from within so you can get back on the road in no time. These tablets might not be able to surf the web, but they are definitely more powerful than you think. But what our radiator leak repair tablets offer in effectiveness, they don’t sacrifice in usability or affordability. In fact, you need no special automotive expertise to apply our tablets to repair radiator leaks. Our Radiator Stop Leak Tablets inhibit the formation of rust and scale, neutralize pH imbalance, control electrolysis, lubricate and seal internal, external and coolant-to-oil leaks. Imagine getting that range of effectiveness in a product you can buy off the shelf rather than through service only a mechanic can provide. In fact, this is the same product that’s been used right on the assembly line by OEM automakers around the world for 30+ years. This solution is the result of careful research and testing on the part of our team of top-flight chemical engineers. They work each day to improve existing products like our radiator leak repair tablets, as well as to develop new products to keep up with the latest in automotive innovations and technologies. Your leak’s days are numbered. Pick up a pack at your nearest auto parts store and make sure you watch our how-to video for an easy step-by-step installation process.
FullTime RVer
Reviewed in the United States on February 22, 2025
Even in lower than package mix ratio, worked quickly
Michel
Reviewed in Canada on January 24, 2025
Un gros camion militaire
Oscar Gravelle
Reviewed in Canada on January 13, 2025
Good price
eddie
Reviewed in the United States on July 25, 2024
Superfast delivery. Worked well for a few weeks, but the head gasket was to far gone. But it did work, and was a great product.
D Brown
Reviewed in the United States on March 24, 2024
I used this product to stop a coolant leak at the timing cover on a Chevy Trailblazer with 250K miles. It was buttoned up tight in an hour with no cooling system side effects. Worked great for me. Just follow the instructions.I did hear a rumor that this product was used to stop a leak in the reactor cooling system in the nuclear submarine Nautilus...so I figured if it was good enough for them, I'd try it in my car. I'm glad I did.
Chad Drake
Reviewed in the United States on December 27, 2024
I have 4 Flathead powered vehicles with old radiators. I use this in all of them just to help with little pin hole leaks. This stuff works quickly and is good to have around if you have an old car or truck
ian
Reviewed in the United Arab Emirates on November 7, 2024
Clogs the water pump
Konstantin Brusilovsky
Reviewed in the United States on June 9, 2023
I had to change head on my boat’s diesel CAT3208. Did not have any problems with the gasket, but head needed to be replaced. However, after the change I noticed small leak around the head gasket. Initially I purchased Bar’s Head Fix, but decided to call the company to get some tips on the installation. The company’s rep, after listening to the nature of my problem, stirred me towards Bar’s tablets. I followed the instructions on the amount, pre diluted tablets, and so far no leak. Just took a 50 mi trip down the coast everything looks good. I was little anxious initially, my engine is 40 years old and I did not properly flushed it, just changed coolant during head replacement procedure. I don’t know how long it is going to last, so far definitely worth it.
Mr._Speed_RG
Reviewed in the United States on February 14, 2023
I had a tiny coolant leak on my 2016 Land Rover LR4. The leak was so tiny that I can go for months without refilling the coolant. I saw this product online and purchased it; when it arrived I followed all the instructions. Guess what? It completely exploded my truck and now I’m going to need to pay for thousands of dollars to get my truck fixed. DO NOT BUY THIS PRODUCT!
f.nayebi
Reviewed in the United States on December 31, 2023
Fixed my leak for only a month
Yeslam Naser Mubarak Badhfari
Reviewed in the United Arab Emirates on January 6, 2023
Deller what great 👍
Gerry G.
Reviewed in Mexico on September 8, 2019
Muy bueno, detuvo la fuga que con otro producto no había resuelto
David R. Voth
Reviewed in the United States on June 17, 2013
My radiator developed a slow but significant leak after I clumsily bumped my Nissan Pathfinder SUV into a reinforced cinder block wall at low speed in a parking garage. I have ordered a replacement, but needed to patch my old radiator well enough to get me through to the next weekend when I will have time to do the swap.The label says the tablets will fit in "most" radiators intact - That may be true for full-size American cars and pickups, but not for any Japanese vehicle I've owned. Following the instructions, I dissolved all six tablets in hot water, poured the resulting slurry into the radiator. I topped off with deionized water and started driving around - First to an auto parts store to get a new radiator cap, coolant, and sealant to prepare for next weekend's projects.After three trips of a few miles each, the leak had attenuated noticeably. I drove out for dinner, and when I arrived at the restaurant there was no noticeable fluid leaking. I checked the radiator this morning, and found it completely full. There was no sign of any leak then or after my Monday morning commute.I've used other leak-stop products before, and I have to say this one appears to be the most effective. I wouldn't trust anything other than a fully sound radiator as a permanent fix, but I am cautiously confident that the Bar's Leaks treatment will get me to Saturday morning without further intervention.
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