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.Great work in mi veicle
Would RecommendI bay this product and works great on mi car head gaskets
From Rislone
Awesome Job on the Leak thank you
Would RecommendHad a bad radiator leak just stopped it instantly when I put this in
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] Used to fix coolant leak and works good for a great price.
From Rislone
Worked like a charm!!!
Would Recommend[This review was collected as part of a promotion.] Thank God for this product...You Saved my life and pocket book. Thank you u
From Rislone
Worked perfect
Would Recommend[This review was collected as part of a promotion.] I had a heater core leak and just a little bit after using this it had sealed it up saved me alot of time and money
From Rislone
Excellent
Would Recommend[This review was collected as part of a promotion.] Had a small leak and this totally sealed it. I will definitely use it again if needed.
From Rislone
Great emergency fix!!
Would Recommend[This review was collected as part of a promotion.] I used this product while on vacation and it sealed my leak and got me home safe.!!
From Rislone
Always a go-to
Would Recommend[This review was collected as part of a promotion.] I’ve bought many bottles over the years and it’s my go-to bottle when I first smell a little hot coolant and you can tell it’s a little Pinhole leak somewhere…
From Rislone
Bar'sleaks radiator and heater core STOPLEAK works
Would RecommendI've been using bar's LEAKS products since 1976 . They have never let me down ! Once on a trip from N.Y. to FLA. the radiator started leaking from a large hole . I put BAR'S LEAK STOPLEAK in filled it with anti-freeze and the leak stopped in a few minutes Thank you !
From Rislone
Awesome product
Would Recommend[This review was collected as part of a promotion.] This stuff saved me a huge headache ripping apart my already busted 2nd gen Dodge dash.Sealed pinhole leak in my heater core, no questions asked.
From Rislone
Works well
Would Recommend[This review was collected as part of a promotion.] I liked how it worked on my car. Worked well for my car.
From Rislone
Great product! Definitely recommend!
Would Recommend[This review was collected as part of a promotion.] Bar's Leak definitely saved me in a pinch! I was traveling and developed a leak and needed something to help me get to my destination. I stopped in at O'Reilly and they recommended Bar's Leak! It stopped my leak and I made it to my destination where I could finish the repair! Great product!
From Rislone
It works!
Would RecommendThis fixed 💯 of the issues I had. Recommended 💯 love the results
From Rislone
I bought it
Would Not Recommend[This review was collected as part of a promotion.] I bought it and I got it in there and we'll see how it works I don't know yet we'll see
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] Got it a couple months ago for the heater core leaking and so far it's been working great .
From Rislone
Had a small leak in Radiator
Would RecommendHad a small leak in my radiator I couldn't locate. Followed directions on the bottle and haven't had a problem sense. Would definitely recommend.
From Rislone
Did it's job
Would Recommend[This review was collected as part of a promotion.] I bought 2 months ago for a heater core leak, it did it's job as advertised almost instantly.
From Rislone
Saved the day.
Would Recommend[This review was collected as part of a promotion.] I've used this product twice now. Once got me home from 6 hours away and the other got my son back on the road.
From Rislone
Easy to use would recommend did the job
Would RecommendI bought this product to see if it really worked and totally recommend did the job
From Rislone
Awesome item
Would RecommendWould use it agen and to my friends and family to use
From Rislone