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.Good stuff
Would RecommendBought this a few weeks ago, helped stop the leak on my radiator in my Chevy Cruze
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] Worked as it says on small radiator leak. No more worry or topping off system it's going into year 4 and leak never returned.
From Rislone
EXCELLENT PRODUCT
Would RecommendPurchased last week and have had no problem since.
From Rislone
94 camerao radiator
Would Recommend[This review was collected as part of a promotion.] Added a bottle two months ago in my old 94 Camaro looking for a quick temporary fix that'd hopefully last long enough for me to save up enough money to buy a new radiator. I purchased the new replacement radiator approximately 6 weeks ago and haven't had any issue for the need to install it just yet. Product still going strong
From Rislone
NOT GREAT!!!
Would Not Recommend[This review was collected as part of a promotion.] I have some sort of small leak in my radiator very very small and slowly I put this in and it still hasn't stopped the leak so I'm saying it's probably not the best product out there.
From Rislone
amazing stuff
Would Recommend[This review was collected as part of a promotion.] I bought add in and my radiator stop leaking after 3 days
From Rislone
Great buy
Would RecommendI bought this about a month ago and it’s been holding up strong I had a small leak in some of my coolant lines but it has stopped and I’m no longer refilling coolant every few weeks, very worth the buy
From Rislone
Helped a lot
Would Recommend[This review was collected as part of a promotion.] I had a radiator leak and I didn’t have enough money for a new radiator. I found this stuff at work and my leaks stopped . Thank you for helping me
From Rislone
Does what it says
Would Recommend[This review was collected as part of a promotion.] Used this product to keep my car running. Did a great job. Stopped the radiator leak.
From Rislone
radiator leaks
Would Recommendbeen a mechanic for 60 yrs. and used bar's radiator stop leak all kinks of radiator leaks always worked great no problems
From Rislone
Very Satisfied!!
Would RecommendWe added this to our antifreeze to help with a slow leak…and it stopped it within 25 miles of driving in the city. I would highly recommend this product!
From Rislone
Multiple times used
Would Recommend[This review was collected as part of a promotion.] I have used Bars Leaks radiator stop leak for 40 years and have never been disappointed
From Rislone
Worked like a charm
Would Recommend[This review was collected as part of a promotion.] Bought this stuff for my old pickup that had a slow radiator leak. Followed the directions, and was happy with the result. I was skeptical but it worked!
From Rislone
Great job
Would Recommend[This review was collected as part of a promotion.] I’m so happy with the progress and product I’m seeing so much improvement
From Rislone
Worked great sealed up the radiator leak
Would Recommend[This review was collected as part of a promotion.] Was on a road trip and the radiator started to leak found a advance and stop in add this a lil coolant and back on the road worked great sealed up the leak been over 2000 miles now and still no leaking will buy again if I need too
From Rislone
3rd generation to use Bars Leak!
Would Recommend[This review was collected as part of a promotion.] Excellent product, only brand that I trust to do what it's advertised to do!
From Rislone
Great stuff
Would Recommend[This review was collected as part of a promotion.] It works really great it stops leaks and my car runs great
From Rislone
Works great
Would Recommend[This review was collected as part of a promotion.] Stopped my car from leaking. Would highly recommend
From Rislone
Great product
Would RecommendI purchased this item more than a year,ago for sealing a waterproof gasket leak 25,000 miles later thr leak restarted so I just purchased another one with over 254,000 miles on my 2015 camaro 2ss I sure it will seal again I door dash almost every day and add 200 miles or more a day and am not disapointed in this product highly recommend to any one experiencing radiator or coolent leakage problem I know of course I will have to replace the gasket some time later hopefully when it's much warmer t...
From Rislone
Great! Heat doesnt smell like coolant!
Would Recommend[This review was collected as part of a promotion.] My heater core has been leaking for months, and it finally stopped! Every time I turned on the heat it would smell very strongly like coolant, but within a day or 2 of driving it completely stopped. 5/5 would recommend
From Rislone