Ratings & Reviews for Bar’s Leaks BAR'S LEAKS Cooling System Radiator Stop Leak Multi-Purpose 11 oz 4 Pack
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this radiator leak sealant for delivering fast, reliable results on small to moderate coolant leaks. Most report dramatic improvements—leaks stopping within 25 miles of driving, coolant no longer dripping, and odors disappearing within days. Many describe it as a lifesaving emergency fix that kept them on the road and avoided costly replacements. Reviewers consistently note sustained effectiveness over months, with some reporting sealed leaks lasting 4 to 9 months. Users appreciate its ease of use requiring no mechanical expertise and no system clogging. A few mention it's not a permanent solution, but the overwhelming consensus is that it works as advertised and delivers exceptional value.
Customer review summary generated by AI, including incentivized reviews.Works Amazing In A Pinch
Would Recommend[This review was collected as part of a promotion.] I used this on a leaking hole in my radiator and it stopped it leaking within 10 minutes of application.
From Rislone
Leak no more!!
Would RecommendI bought this after finding coolant leaking under my car I followed directions and it worked perfectly as described
From Rislone
Have used this product for decades.
[This review was collected as part of a promotion.] There are thousands of "mechanic in a can" products available. Only a handful of them are at all effective. Bar's Leaks Radiator Stop Leak works every time I have used it. I have found it to be a lifesaver when out on the road and the radiator or heater core develops a leak.
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] Had a leaking heater core and I used this product and it was an immediate fix!!!
From Rislone
A Product That Works
Would Recommend[This review was collected as part of a promotion.] I have used this product in everything from an AustinHealy Spite to many Ford and GM products It is a permanent solution to a nagging seepage issue. It has been on the market for a long time because it simply works each and every time.
From Rislone
Stuff works great
Would RecommendWorked as advertised! This concentrate actually works and seals leaks, but it could take more than a single bottle. I always travel with a full bottle of this in my truck. Follow the bottle instructions and you will be good to go.
From Rislone
IT ACTUALLY WORKS!
Would Recommend[This review was collected as part of a promotion.] My dad taught me 60 years ago that BarsLeaks was a necessity for cooling systems and that some car manufacturers actually put it in new cars at the factory. Ever since, I have always included it in every coolant system flush and fill, leaks or not. Recently my 1986 Corvette had a small coolant leak that I couldn't find. I put in bars leaks and NO MORE LEAK! It is great stuff!
From Rislone
First Try --- Great Start
Would RecommendI just tried one of the products and it worked good, saved me money, and gives me a sigh of relief. Thank you. Please keep on making more products to help us.
From Rislone
Works great
Would RecommendWas out of town and had an small leak on the side of my radiator stopped and bought the radiator stop leak worked great would recommend
From Rislone
Works great
Would Recommend[This review was collected as part of a promotion.] No issues since using . It totally sealed. Thank goodness. Michele
From Rislone
fantastic product!
Would Recommend[This review was collected as part of a promotion.] I was having trouble with tiny pinpoint leaks at the bottom of my radiator, so I picked this up to try, and I'm so glad I did. Rather than having to replace the entire radiator, the holes stopped leaking and kept me on the road! Well worth buying.
From Rislone
GREAT PRODUCT
Would Recommend[This review was collected as part of a promotion.] I have used this product in 3 separate vehicles and it has worked like a charm every time!
From Rislone
Absolutely amazing
Would RecommendI bought this a week ago because my radiator had a small leak on the side of it after I put this amazing product in you can visually see the coolant stop leaking out. Liquid magic.
From Rislone
Old tried and true
Would RecommendThis product is always been handy for me over the years especially you and hasn't preventive maintenance for possible leaks while traveling. This is always my quick grab go to to slow down any kind of coolant leaks that may be having within my cooling system that's pressurized. Although you can run it long-term in the system after you do your repair it makes for easy cleanup because nothing gets clogged.. I hope this product stays in the market for the rest of my life and beyond.
From Rislone
Work as it should
Would RecommendIam so Glad I used this save me a lot of time and money!
From Rislone
Great product
Would Recommend[This review was collected as part of a promotion.] I've been using this product for years and all of them. They work great for me and have saved me a lot of money over the years. I will continue to use them as long as I have vehicles.
From Rislone
GREAT PRODUCT
Would Recommend[This review was collected as part of a promotion.] I brought this to fix my radiator it got me back home and is still working
From Rislone
Radiator new out box again
Would RecommendBought this to keep from spending hundreds on a new radiator and it was the best move I ever did!
From Rislone
Easy to use
Would Recommend[This review was collected as part of a promotion.] I wasn’t so sure when I bought this product but it worked It save me a ton of money
From Rislone
Helped me in an emergency
Would RecommendHad a radiator leak while on a trip and this allowed me to get to a proper place for radiator fix.
From Rislone