Ratings & Reviews for Bar’s Leaks BAR'S LEAKS Cooling System Radiator Stop Leak Multi-Purpose 11 oz 4 Pack
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this radiator leak sealant for delivering fast, reliable results on small to moderate coolant leaks. Most report dramatic improvements—leaks stopping within 25 miles of driving, coolant no longer dripping, and odors disappearing within days. Many describe it as a lifesaving emergency fix that kept them on the road and avoided costly replacements. Reviewers consistently note sustained effectiveness over months, with some reporting sealed leaks lasting 4 to 9 months. Users appreciate its ease of use requiring no mechanical expertise and no system clogging. A few mention it's not a permanent solution, but the overwhelming consensus is that it works as advertised and delivers exceptional value.
Customer review summary generated by AI, including incentivized reviews.Great product!
Would RecommendAny pin hole i find in a radiator ot heater core this is my go-to fix!
From Rislone
Very good stuff to use in your Vehicles.
Would Recommend[This review was collected as part of a promotion.] I bought this a month ago for my truck and I would
From Rislone
Worked like a charm!
Would RecommendI've spent a fortune on antifreeze in the past few months and bought one bottle of bars and haven't had to add antifreeze cents. Should have just done that to start with.
From Rislone
Worked better than I expected!
Would RecommendI was having some issues with my radiator and was about to buy a new one but decided to stop by the auto parts store and was suggested to try this out. I bought it and put it in my car and it worked exactly how they said it would. Thankful to not have to spend so much on a replacement!
From Rislone
Sadly, radiator leak was tricky
I bought this to extend the life of my radiator, it worked for about 3 weeks then the car started running hot with a big leak.
From Rislone
Great Product!
Would Recommend[This review was collected as part of a promotion.] I purchased this product to fix my slow leaking radiator. It worked beautifully!
From Rislone
Amazing Treatment
Would RecommendMy radiator began leaking but I noticed also my water pump was making weird noises like the bearing was having a problem in the pump. It wasn't leaking so I thought nothing of it, I just didn't want to keep losing coolant from the radiator. I bought the Bar's Leak Cooling System Radiator Stop Leak. I poured the pellets in my radiator, top it off with coolant and started my car. I ran the engine at 2000 rpms for about 15 minutes. Looked under the car and the radiator was no longer leaking and the...
From Rislone
Stopped my radiator leak for 5 years.
Would RecommendI like Bar's leak products because they have worked great for me.
From Rislone
Got me out of a jam.
Would RecommendHad a pin-hole during a road trip and was out of raw eggs. This got us back on the road and safely to our destination. Love this stuff!!
From Rislone
So Far So Good
Would Recommend[This review was collected as part of a promotion.] I had a small leak, I used half a bottle and so far it seemed to work.
From Rislone
Really works!
Would Recommend[This review was collected as part of a promotion.] I didn’t know what to do, knowing I had this leak but couldn’t get my car in to the shop due to lack of funds at the time. I grabbed this, hoping for the best, & it actually did the trick.
From Rislone
Worked surprisingly well
Would RecommendBought a few months ago for 90s Cadillac and after a few tries it sealed up
From Rislone
Good product
Would Recommend[This review was collected as part of a promotion.] I bought this 3 weeks ago for my truck, it had a radiator leak,this amazing product stop that leak.
From Rislone
Works
[This review was collected as part of a promotion.] I bought this product a few weeks back. I had a small leak in my radiator. I used it and have had on problems since. This is the first time using Bar's and would recommend them to anyone.
From Rislone
Great product
Would RecommendBought this for an older car, I seen a major improvement. Would recommend to everyone.
From Rislone
Works Excellent
Would Recommend[This review was collected as part of a promotion.] I bought this for a Silverado I had and my radiator was leaking, poured it in and after a little driving it sealed up and pretty much stopped the leak until I was able to replace the radiator, works wonders and a good price!!
From Rislone
Awesome stuff works great
Would Recommend[This review was collected as part of a promotion.] Love this product it works great for my car it works great. Recommended to everybody who has a problem with the leak.
From Rislone
Great product to use on your car.
Would Recommend[This review was collected as part of a promotion.] I bought this product and it worked very well for my vehicle.
From Rislone
Oil stop leak
Would Recommend[This review was collected as part of a promotion.] Best stop leak products it’s the best ever I will buy again
From Rislone
Plugged hole, for 3 months
Would RecommendBetter than I expected to work. Plugged up hole in radiator pretty quick. Held for 3 months before new hole started. Ran another bottle through. Worked a second time.
From Rislone