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.Radiator Keak!
Would Recommend[This review was collected as part of a promotion.] I used this product when I noticed a leak 7 years ago from the radiator in my 1980 Jerp Cherokee Sport and it never leaked again! Would highly recommend!👍
From Rislone
Stopped the leak
Would Recommend[This review was collected as part of a promotion.] I got this cause I had a leak n sure enough it worked.
From Rislone
Great stuff !
Would RecommendI bought the stuff a few months age for my 93 ford bronco and it worked wonders ! Ths stuff is fantastic
From Rislone
Really great stuff
Would Recommend[This review was collected as part of a promotion.] I've used liquid aluminum several times and has never let me down. I use nothing but bar's products
From Rislone
Successful outcome
Would RecommendI bought this in hopes I could fix the radiator leak(s) without the cost of a whole new radiator. Thankfully it worked! Followed directions and now I’m up and running the roads without a worry
From Rislone
Works great!
Would RecommendI have a 1961 Pontiac Catalina and have had to use this jn the radiator until we were able to buy a new one and it worked greats not another leak at all for the 9 months we used it in the old radiator until we got the new one installed.
From Rislone
Really works!!!
Would RecommendI bought this after my 17 year old son hit a deer with my car, which caused my radiator to leak and my car to overheat so much that it was inoperable. I didn't have the money to take my car to the mechanic for a new radiator, so I purchased this product and it actually worked! The leak stopped and I was able to drive my car again!! I definitely recommend trying this product before spending hundreds of dollars at the shop!
From Rislone
Worked great so far!
Would RecommendSo happy to get this, we had a slow small leak, that couldn’t be found, but this did the trick!
From Rislone
leaky radiator
Would Recommend[This review was collected as part of a promotion.] i had a radiator that was leaking around the input port, i poured this in and within 50 miles the leak went away and there was a small aluminum bead around the leak spot clogging it
From Rislone
Radiator stopped leaking!!
Would RecommendI purchased the Bar's radiator stop leak after using a different brand. I should have purchased Bar's in the beginning, I wasn't familiar with the brand. After using the Bar's product my radiator on in my Mercedes finally stopped leaking. I plan to get it replaced eventually but I needed to still get to work in the meantime until I have the money for the repair. I definitely recommend this product if you are experiencing the same problem
From Rislone
Hold me over!
Would RecommendRecommended this to a few people so far. Buys you a bunch of time if the radiator is leaking from a ghost spot that you just can't seem to find. This stop leak sure can though.
From Rislone
Satisfied
Would Recommend[This review was collected as part of a promotion.] Good product buying this fixed my radiator leak. Im happy with the outcome.
From Rislone
Good product
Would Recommend[This review was collected as part of a promotion.] I have used this in many different older cars over the years. Works great for stopping small leaks in radiators
From Rislone
Work great to stop leaks
Would Recommend[This review was collected as part of a promotion.] My husband & I bought this product b/c we had a leak in our radiator, this product truly helped to stop the leak & improve performance.
From Rislone
Great
Would RecommendGreat for what it for but any bigger leaks should be looked at by a mechanic
From Rislone
IT SURLY STOPPED MY LEAK
Would RecommendI knew about bars leaks for years, but never used it until now. I used it and I'm a true believer. Now that it truly works and stop my leak and my radiator.
From Rislone
The leaking stopped
Would RecommendHad a radiator leaking pour the bottle drove it for a few miles and it stopped happy with the result
From Rislone
Heater core
Would Recommend[This review was collected as part of a promotion.] I used this product to temp repair my heater core till the weather broke. Worked as it said it did. It actually bought me 2 years
From Rislone
Bars head gasket leak repair
Would Recommend[This review was collected as part of a promotion.] I bought the stuff couple days ago and I'm happy I did my trucks running fine no more leaks in the head gasket
From Rislone
Great!
Would Recommend[This review was collected as part of a promotion.] I bought this today and was amazed with the results!
From Rislone