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.Love it.
Would RecommendSeal on my peterbilt leaking. On the reservoir that bolts to radiator. Slowed it up. Enough to make it save to drive. Love ❤️ it. I’ll keep a can in my semi for emergencies for on now
From Rislone
lifesaver product!
Would RecommendProduct was a lifesaver stopping the leak instantly in my 2000 Toyota Tundra and got me back home safe.
From Rislone
Perfect product
Would RecommendThis product help me a lot cause my radiator are a little damaged but this help to fix it
From Rislone
Works great and easy to use!
Would Recommend[This review was collected as part of a promotion.] I used this product on a old clark forklift and it sealed the headgasket instantly.
From Rislone
Great
Would RecommendI have been using barsleak for years and never had a problem with it. If you have a cooling system leak this stuff will fix it.
From Rislone
Bars leaks liquid
Would Recommend[This review was collected as part of a promotion.] I got this product and it works amazingly i would 100% recommend it to everyone who has leak issue in the car
From Rislone
Great works instantly
Would RecommendEasy to use product when fallow directions on back label
From Rislone
Worked great
Would RecommendBought for my 98 ram 1500 and worked great and stopped the leak
From Rislone
Originally intent was for a temporary fix
Would Recommend[This review was collected as part of a promotion.] Originally purchased to help hold over until I could perform the necessary repairs for my Honda Element. It’s now been 2 months since use and it’s still holding up and has caused me to be forgetful about fixing the original overheating issue. If it ain’t broke don’t worry about it :)
From Rislone
Did its job
Would RecommendIt stoped the leak but left some reside in the hoses and reservoir. It’s a temporary leak fix, temporary. But def worked for what I needed!
From Rislone
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