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 Stop Leak
Would Recommend[This review was collected as part of a promotion.] i bought this to hopefully give my radiator more life before replacing it and it worked amazing!
From Rislone
Standard equipment
Would Recommend[This review was collected as part of a promotion.] Used this in all tractor radiators growing up. Now I leave a bottle of radiator Bar's Leak in every truck and car my family has, especially when traveling. Provides peace of mind
From Rislone
Great features. Straight diesel.
Would Recommend[This review was collected as part of a promotion.] I bought this product a few months ago.And my vehicle still running perfect
From Rislone
Worked immediately!!
Would Recommend[This review was collected as part of a promotion.] I bought this product two days ago because I was having issues and losing coolant rapidly. I used this on my pickup and started her up. The dripping stopped after a couple minutes. I’m still driving it today and haven’t seen any coolant yet.
From Rislone
WORKED GREAT
Would Recommend[This review was collected as part of a promotion.] BOUGHT IT LAST MONTH AND IT WORKED DIDNY EXPECT IT
From Rislone
Gets the job done
Would Recommend[This review was collected as part of a promotion.] This Bar’s product was able to fix my leak in a pinch and allow for me to finish my trip without having to come out of pocket for costly repairs.
From Rislone
Worked great
Would Recommend[This review was collected as part of a promotion.] I have used this product several times in the past for fixing small leaks in radiators. Great product for the money
From Rislone
Stopped my radiator leak as advertised
Would Recommend[This review was collected as part of a promotion.] I bought this to seal a leaking radiator...it works
From Rislone
Grate product
Would Recommend[This review was collected as part of a promotion.] I bought this product a month ago and work super good i highly recommend it
From Rislone
Fixed interior leak in Heater Core
Would Recommend[This review was collected as part of a promotion.] Wow!!! Shook it up, added it to the system and now no more leaks and no more smells in my Buick Lacrosse. Easy fix for an affordable cost. It has been a few months and still fixed without any problems.
From Rislone
No more leaky heater core
Would RecommendGot this a couple months ago when it was cooler and the heat would stink of hot antifreeze. It stopped the leak and the smell!!!
From Rislone
Great product!
Would Recommend[This review was collected as part of a promotion.] I brought it 2 days ago overall van feels better running.
From Rislone
It workedfora small rub hole.
Would Recommend[This review was collected as part of a promotion.] My son-in-law hit a deer with my car and then continued to drive it for 3 days before the bumper finally rubbed a hole in the radiator. I beat the car with a hammer until the radiator wasn't getting rubbed on anymore dumped this in and it seemed to fix the problem just fine.
From Rislone
Leak Stopped
Would Recommend[This review was collected as part of a promotion.] Used in my 92 Chevy Pickup. It stopped the leak. I’m currently unsure of the repair longevity, but it’s stopped enough for me to get some from out of state.
From Rislone
Excellent for leaks
Would Recommend[This review was collected as part of a promotion.] The money I gotta leak on my car.That's coming from the exhaust into my radiator and no stopling has actually helped stop that, but this stop leak has slowed it down dramatically and I use one a week for 6 months now.It's keeping my car alive as best.I can from spreading it's pretty stout
From Rislone
amazing for stopping the leak.
Would Recommend[This review was collected as part of a promotion.] good product. it stopped the leak on stop of my motor.
From Rislone
Excelente producto 👌.
Would Recommend[This review was collected as part of a promotion.] Me ahorro mucho dinero al usarlo en mi vehículo, gracias.
From Rislone
Fixed my leak
Would RecommendI had bought this stop leak my mechanic recommended for a quick fix for a small leak on the radiator and I’m sure happy I did listen to him. Especially with all the other options this actually works.
From Rislone
works great!
Would Recommend[This review was collected as part of a promotion.] I bought this a little while ago and it stopped the leaks
From Rislone
Just as advertised! As always....
Would Recommend[This review was collected as part of a promotion.] I've used bars leaks products when a situation showed up over the years, and recently had a perplexing leak i could not find but definitely knew was occurring. So I bought a bottle and the problem be ame non existent!
From Rislone