Ratings & Reviews for Bar’s Leaks Bars Leaks Liquid Aluminum Radiator and Heater Core Cooling System Radiator Stop Leak 16.9 oz
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this leak sealant for effectively stopping radiator and heater core leaks within minutes or after a short drive. Most report dramatic results like "leak completely stopped" and "sealed up my radiator quick," calling it a life saver. Reviewers consistently highlight its affordability and ease of use—simply pour and drive without tools or professional help—often saving hundreds on repair costs. Many report sustained success over weeks or months, with some using it repeatedly over years for older vehicles. A few note it works only for minor leaks, not major damage, but overall customers strongly recommend it as a reliable temporary solution.
Customer review summary generated by AI, including incentivized reviews.Wonderful product
Would Recommend[This review was collected as part of a promotion.] Worked terrific in my car 10/10 would recommend to other people and mechanics alike
From Rislone
Works fantastic
Would Recommend[This review was collected as part of a promotion.] Have always used bars leak for my radiators Started using it when I was in high school with my first car. Have used in every car since, including my wife's, and all my kids.
From Rislone
Great
Would Recommend[This review was collected as part of a promotion.] Bought it yesterday and always use this brand from auto parts store
From Rislone
Does what it says!!
Would RecommendI have an 84 Bronco with the original radiator which needs to be replaced eventually but this stuff really does stop the leaks that pop up from time to time.
From Rislone
Radiator leak
Would Recommend[This review was collected as part of a promotion.] Great product I used it for my radiator it worked instantly
From Rislone
Really works!
Would Recommend[This review was collected as part of a promotion.] I bought this a while back because I had a small leak where I didn’t want to get a new radiator for my vehicle, decided to try this bottle out and miraculously saved me out of getting a new radiator, would recommend for small leaks.
From Rislone
Such a great product!!!!!!
Would RecommendI bought this for my car used once and it’s been working ever since and it’s been months ago. Would recommend this to anyone.
From Rislone
I’ve heard of bars for many many years
Would Recommend[This review was collected as part of a promotion.] Had an issue with the rear main Seal and I thought I would give it a shot. I did. It helped out quite a bit. I would recommend this to all of my friends.
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] I bought this product and really worked. I’m really glad I bought it
From Rislone
Stopped my leak perfectly
Would RecommendMy jeep had a small leak and it took care of it quick.
From Rislone
This stuff is amazing!
Would RecommendI bought this over a year ago because my heater core was leaking. I haven't had an issue with it since I put this stuff in the car. It's amazing stuff!
From Rislone
Worked great to stop my radiator leak
Would Recommend[This review was collected as part of a promotion.] I bought this to seal tiny leaks in my radiator and worked great. I always use this brand
From Rislone
Radiator Repair
Would RecommendI bought this product about two months ago and the results were amazing.
From Rislone
Works good
Would Recommend[This review was collected as part of a promotion.] I bought this for a radiator that I shouldn’t of tried to fix bc within like 30 minutes and there would be no water in it and it tried its best to fix the whole but it was to big didn’t want to put more than one bottle in but it did pretty good I just put it in another one and it’s a small leak so I only did half a bottle hopefully it works great to
From Rislone
Crisis solved
Would Recommend[This review was collected as part of a promotion.] My daughter’s 2010 Yaris was losing coolant. I discovered a small leak in the radiator I decided to give the Bar’s Leaks a try before I had to pay for a new radiator That was 3 weeks ago and so far no leaks Crisis averted
From Rislone
Worked on a 1987 chevy
Would RecommendHad a pinhole leak in the radiator and used the product and like it said...didn't leak till I was able to replace it.
From Rislone
%100 recommend
Would Recommend[This review was collected as part of a promotion.] I got it a little over 6 months ago threw it in during my radiator flush cause I lost my heat during the winter, I tell you what for loving the heat when it starts to get colder this really help and so far it’s still going strong, I’m pretty much just testing the product at this point I got my new radiator just sitting in the garage until the bars leak fails and finishes my radiator off
From Rislone
Stops coolant gooddddd
Would Recommend[This review was collected as part of a promotion.] Stopped a coolant leak i couldn’t find after replacing stuff couldn’t believe it worked like magic
From Rislone
Great for my Honda
Would Recommend[This review was collected as part of a promotion.] Bought it a while ago can feel the smoother driving
From Rislone
Works great
Would Recommend[This review was collected as part of a promotion.] I was going to throw away my 3 ton floor jack. It turns out that I just needed hydraulic fluid. Your product corrected my problem and saved me the cost of purchasing a new jack.
From Rislone