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.Works great
Would Recommend[This review was collected as part of a promotion.] 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 gas...
From Rislone
Stop leaks
Would RecommendWorks well enough if it's small hole or a emergency to get you home not recommended for a forever fix but does what it says
From Rislone
thisradiatordidagreatjobstoppingtheleakonmytactor.
Would Recommendtheproductanditworkedontheradiatorofmytractor.itisagreatitemforstoppigleaks
From Rislone
Lives up to the name
Would RecommendI ordered some radiator stop leak a couple of weeks ago. After putting this product in the small leak I had is gone! Thank you!
From Rislone
Works very well
Would RecommendI bought this product 2 weeks ago and it slowed down my radiator leak that I had
From Rislone
Good stuff
Would Recommend[This review was collected as part of a promotion.] Bought this to seal up a pin hole until I could afford a new radiator
From Rislone
Works as advertised
Would Recommend[This review was collected as part of a promotion.] Used to fix a slow leak in my Jeep, worked perfect !
From Rislone
Works Great
Would Recommend[This review was collected as part of a promotion.] Works as advertised. One of the only formulas that is pelletized.
From Rislone
Works every time
Would RecommendGood product. Used it on a third car and it has worked each time.
From Rislone
Works great!
[This review was collected as part of a promotion.] I had a slow leak that was getting worse, so I gave bars a try, and it stopped leaking.
From Rislone
Works just how it says
Would Recommend[This review was collected as part of a promotion.] Bought this bc I had a small leak in my radiator and this stuff sealed it right up.
From Rislone
This is some really good stuff and it works great
Would Recommend[This review was collected as part of a promotion.] I bought 2 bottles of this bars leak radiator stop leak and I fixed 2 vehicles with it with no problem 1 was a 2002 Ford f150 4 door and the other was a 2000 Lincoln it's been 4 months ago and they are still running great but I forgot to take any pics but I really recommend it to anyone
From Rislone
Great stuff that works
Would Recommend[This review was collected as part of a promotion.] I was on the way home and was 800+ miles from home when a rock shot out from the tires on a semi trucks trailer. I found an auto parts store, tried to buy a new radiator but it was one they don’t keep in stock and had to order one which would take two days. Well nope on that so I went straight back to where they keep the Bar’s leak and grabbed one of these and followed the directions. The stuff works, and I’ll eventually going to need it again....
From Rislone
Great product!
Would Recommend[This review was collected as part of a promotion.] Had problems with my radiator leaking and this fixed it so easily. I don’t have to take anything off it was super convenient and saved me a trip to the shop. Would highly recommend.
From Rislone
Works well
Would Recommend[This review was collected as part of a promotion.] I bought this two weeks ago and it worked really well
From Rislone
Awesome product
Would Recommend[This review was collected as part of a promotion.] I bought this for a coolant issue. Small leak that I couldn’t find. This sealed it up and haven’t had a since drop missing since! Thank you!
From Rislone
Quick fix almost Instantly
Would RecommendBought it a week ago and still holding up and seems like it did exactly what I Needed it for
From Rislone
Amazing Stuff
Would Recommend[This review was collected as part of a promotion.] I got this a while ago for a radiator with a leak that was in such a bad spot and I couldn't get to it. After using this, I was amazed how quickly it stopped and have recommended bars ever since! Great reliable products
From Rislone
Awesome product
Would RecommendGot this a few weeks ago. So far, it has done exactly what it says it does. No complaints from me.
From Rislone
Radiator stop leak works
Would Recommend[This review was collected as part of a promotion.] My radiator coolant reservoir was losing antifreeze which I had to top off once a week. I tried this product Stop Leak and the small leak stopped
From Rislone