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.Temporary fix
[This review was collected as part of a promotion.] I bought it and it worked for a very small amount of time for a very small leak
From Rislone
Works as it says
Would Recommend[This review was collected as part of a promotion.] Used to fix a small seep on a 2005 colorado truck. After driving it a couple of days and 175 miles. seepage on radiator has stopped.
From Rislone
Can’t believe how good this stuff worked
Would Recommend[This review was collected as part of a promotion.] Had a leak in the radiator used this stuff and no more leaks
From Rislone
Best stop leak around!!!
Would Recommend[This review was collected as part of a promotion.] Used the bars leak stop leak on my radiator for a leak and the results are still surprising. Haven't had no problems since. A great product in their line up of products would always recommend the bars leak to anyone for any leak cause they about cover it all. Enjoy your day
From Rislone
Muy buen pro
Would RecommendBueno y tremendo para dar vida al motor y mantener después de caliente
From Rislone
Leak Be GONE!
Would Recommend[This review was collected as part of a promotion.] Very pleased with Bar’s Cooling System Radiator & Heater Core Stop Leak. Followed instructions to the “T” & it worked. My small leak disappeared. Happy customer and have recommended to friends & family. Great product
From Rislone
Excellent products
Would RecommendI have used several times and recommend to othets.
From Rislone
Performs as stated
Would RecommendMy mechanic uses all the time and I trust him. Works.
From Rislone
This was a SAVER!!!
Would RecommendThis helped out my truck!!! Thank glad I came upon this product!!!
From Rislone
Works great. Stop the Leak.
Would Recommend[This review was collected as part of a promotion.] I bought this product about 4 months ago and it's still working.
From Rislone
It works
Would Recommend[This review was collected as part of a promotion.] I used it on my 2005 Toyota 4Runner I've had no problem since been home strong
From Rislone
Awesome feature
Would Recommend[This review was collected as part of a promotion.] I bought a couple months ago, worked great for about 2 weeks long enough for me to get it completely fixed thanks bars.
From Rislone
It did what it said it would.
Would RecommendIf you need something that works and will work fast, this is a pretty solid option. It stopped my heater core from leaking so it dripping antifreeze on my floorboard And it didn’t cause any issues. I would not say this is a permanent fix and works best on smaller leaks. But overall it did what I needed it to do
From Rislone
Works great! Stopped the leak highly recommend!
Would Recommend[This review was collected as part of a promotion.] I work in the package delivery industry and had some trucks with leaking issues bought this product and haven’t had any issues for a few months!
From Rislone
Amazing product
Would RecommendI bought this after noticing some leaking issues in my car. It worked great. I have bought this brand in the past and will continue to buy in the future
From Rislone
Works great!
Would RecommendPut it in my t800 stoped my leak in just a few minutes
From Rislone
Excellent!
Would RecommendWorked Excellent! Saved me from having to replace my radiator.
From Rislone
Have used this in a couple cars. Works well.
Would RecommendI have personally used it and have told friends and family to try it.
From Rislone
Worked great
Would Recommend[This review was collected as part of a promotion.] Bought this for my 1978 Chevy truck heater core leaking 6 months ago still holding up great 👍
From Rislone
Much needed
Would Recommend[This review was collected as part of a promotion.] Bought this last week and can see why I was recommended it. It definitely helped!
From Rislone