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Bar's Leaks High Mileage Cooling System Repair

4.2 4.2 out of 5 stars 286 ratings
$9.53 with 36 percent savings
List Price: $15.00

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1 Pack
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Purchase options and add-ons

Brand Bar's Leaks
Liquid Volume
16.9 Fluid Ounces
Package Information
Bottle

About this item

  • Stops Cooling System Leaks
  • Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
  • Premium Carbon Fiber Formulation For Extended Protection
  • Stops cooling system leaks
› See more product details
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Frequently bought together

Bar's Leaks High Mileage Cooling System Repair
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Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair
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From the manufacturer

LEGENDARY PERFORMANCE FORMULAS Since 1921
Coolant system

Frequently Asked Questions

Can Bar’s Leaks Cooling System Repair be installed in existing antifreeze coolant?

Yes, Cooling System Repair is specifically designed to be directly added to the cooling system without having to flush out the antifreeze as long as manufactures recommendations are followed. It also can be used in water alone. NOTE: Cooling systems that are dirty or partially clogged should be flushed before usage.

Do I need to drain my cooling system after using Cooling System Repair?

No, this product is designed to be left in the cooling system to protect from future leaks and overheating.

How long does it take to see results?

We recommend you drive/idle the vehicle for 15 minutes. In most cases the leak will be sealed instantly, but others will require up to 20 minutes. If the leak is not sealed in 20 minutes, a second application may be required or mechanical repair may be needed.

Don't let a coolant leak get you blue

  • We know it can be frustrating when you’re in a rush and notice a puddle of fluid under your car.
  • Fixing coolant leaks can be incredibly frustrating and inconvenient for everyday drivers.
  • Lucky for you, we have the perfect product to help you get back on the road and back to your life.
Leaking Blue Fluid? Temperature Warning Light? Low Oil Levels? Smoke from the engine? Something smells sweet or funky?
Customer Reviews
4.2 out of 5 stars
286
4.2 out of 5 stars
286
4.2 out of 5 stars
2,468
4.3 out of 5 stars
3,366
4.3 out of 5 stars
1,043
Price $9.53 $9.53 $10.62 $7.69 $7.97
Identify the Symptoms My car is leaking either yellow, orange, purple, blue or green colors I have a temperature warning light or temperature gauge is at high end. My engine is reading low oil levels, but not sure it is leaking. I'm seeing white smoke or steam coming from engine/hood I'm seeing excessive moisture on the inside of the windshield or on the car mats in the foot wells.
Best Solution Bar's Leaks Cooling System Repair. Bar's Leaks Cooling System Repair. Bar's Leaks Rear Main Seal Repair Concentrate. Bar's Leaks Liquid Aluminum Stop Leak Bar's Leaks Block Seal Liquid Copper Intake and Radiator Stop Leak
Alternative Solutions Bar's Leaks Liquid Aluminum Stop Leak Bar's Leaks Liquid Aluminum Stop Leak Bar's Leaks Main Seal Motor Oil Leak Repair Bar's Leaks Cooling System Repair. Bar's Leaks Liquid Aluminum Stop Leak
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Made in the USA

Each individual Bar’s Leaks product is formulated and manufactured right here in the U.S.A. We’re committed to creating fast and affordable products that fit perfectly into your lifestyle and budget. Choose Bar’s Leaks, so you can discover just how simple automotive maintenance can be when you have the right tools.

Bar’s Leaks. Stop Leaks. Not Life.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With over 75 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.

Product Description

Bar’s Leaks®High Mileage Cooling System Repair has twice the performance of other products, by not only stopping cooling system leaks, but adding future protection. It is scientifically formulated to stop coolant leaks, thereby reducing antifreeze loss, while correcting other cooling system problems helping to prevent costly repairs and breakdowns. In addition, Cooling System Repair contains Xtreme Cool™ which stops overheating and reduces water temperature. Works on all vehicles and in any gasoline, turbocharged and diesel engines. Use with ALL 50-50 mix types and colors of antifreeze coolant and / or water. For most vehicles leaks stop instantly. For many vehicles, this is your last change before paying an expensive repair bill or replacing the vehicle.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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Bar's Leaks High Mileage Cooling System Repair

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What's in the box

  • (1) Bottle Cooling system repair

    • Product guides and documents

    User Manual (PDF)
    User Guide (PDF)

    Looking for specific info?

    Customer reviews

    4.2 out of 5 stars
    4.2 out of 5
    286 global ratings

    Customers say

    Customers have mixed opinions about the auto oil. Some say it leaks, while others say it performs well.

    AI-generated from the text of customer reviews

    16 customers mention11 positive5 negative

    Customers are mixed about the performance of the auto oil. Some mention that it works great, is a temporary fix, and works instantly. However, others say that it didn't work for them and didn' t help.

    "...Excellent product" Read more

    "WORKED GREAT ! forgot I had drained my 1955 farmall tractor to replace the anti-freeze last fall...." Read more

    "The first bottle did not work, so I poured in a second one, and it worked and stopped the leak...." Read more

    "...to run betterand never had any aftereffect fromit is safe to use" Read more

    15 customers mention8 positive7 negative

    Customers are mixed about the leakage. Some mention that the product stopped a very persistent leak, while others say it didn't make a difference.

    "...10 minutes later, the leaks had stopped. HAPPY MAN - GREAT PRODUCT" Read more

    "...Was leaking from lower side of pump about 3 quarts came out when I stopped to get gas...." Read more

    "Had my doubts, but this stuff stopped a very persistent leak that was making me refill my expansion tank every day!..." Read more

    "...It will seal up small holes if your radiator is leaking...." Read more

    9 customers mention4 positive5 negative

    Customers are mixed about the quality of the auto oil. Some mention it's a good product and worth every penny, while others say that it clogged their radiator, heater core, and cooling pipes.

    "...DO NOT BUT BECAUSE IT WILL ABSOLUTELY POSITIVELY CLOG YOUR RADIATOR!!! I just had to replace my radiator and water pump because of this product...." Read more

    "...Not a drop since then (about three months now). Definitely worth every penny and saved me from spending the $2K that the mech wanted to replace all..." Read more

    "...coming out was only 60degrees. This product clogged the heater core and cost $100 to have it flushed out to where the heater..." Read more

    "Good Product!!" Read more

    Did not stop the leak on plastic tank
    2 Stars
    Did not stop the leak on plastic tank
    My fj has very small pin hole on the plastic tank of the radiator. As following the instruction, the radiator was flushed and refilled with the brand new coolant, and then ran the engine for about 30 mins. However it did not stop the small pin hole as I dound it 2 days after. At least it did not clog the heater core but did not stop the coolant leak.
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    Top reviews from the United States

    Felisha Holland
    5.0 out of 5 stars Worked instantly!
    Reviewed in the United States on March 2, 2024
    Size: 4 PackVerified Purchase
    I have used this on a few different vehicles from leaking water pumps, radiators and even a head gasket. It hasn’t failed me yet, will continue to keep using in the future
    One person found this helpful
    Helpful
     Report
    SC Porsche
    5.0 out of 5 stars Miracle savior
    Reviewed in the United States on July 5, 2021
    Size: 1 PackVerified Purchase
    Drove 2500 miles now after what appeared to be a weeping waterpump. Was leaking from lower side of pump about 3 quarts came out when I stopped to get gas. Put this in with 2 bottles drinking water and drove 500 miles home. 100 degrees out AC on all the way. Coolant still full. Have driven 2000 more miles since and hasnt leaked a drop. Waterpump seems solid and doesnt wiggle so maybe just dried seals from sitting for months during covid. Will keep an eye on it but this is some miracle stuff. Waterpump and belt and coolant sitting in garage so now just waiting for it to stop working. I may be waiting a long time. We will see

    Update May 2022. Waterpump finally went out in driveway but let me take 3 x 2000 mile trips with full AC on and 100 degree temps outside

    Gave me lots of time to buy parts and tools and fix it in my garage when it blew. Excellent product
    11 people found this helpful
    Helpful
     Report
    ramiro castaneda
    4.0 out of 5 stars good products
    Reviewed in the United States on December 16, 2022
    Size: 1 PackVerified Purchase
    good pro
    One person found this helpful
    Helpful
     Report
    Ralph W.
    5.0 out of 5 stars Stopped a coolant leak from the infamous 2006-2009 Honda R18 block crack!
    Reviewed in the United States on May 21, 2023
    Size: 4 PackVerified Purchase
    Had just purchased a used 2006 Honda Civic as a second auto and sure enough the block cracked at the water jacket spewing the whole contents of the coolant overflow reservoir in 10 miles. This manufacturing defect is a known problem so much so that Honda extended the warranty to 10 years. Didn't help me of course as i bought it in 2022. So in goes the Bars System Repair. Why not ? Nothing to lose as a replacement block costs many times over the value of the car even if I found a worthy replacement or whole engine from a junkyard. What do you know? It worked!! My leak has slowed to a very manageable 2 oz. , maybe less a week. Since I check my oil every week, it is a routine check anyway. I have 3,000 additional miles since and the result far exceeds my expectations. The coolant temperature has not changed from it's normal range one bit either. I dare say maybe a little less! As the only fix for a cracked block is replacement, (even welding on aluminum is temporary at best), this product is genius! Congratulations to the chemists at Bars. NOTE: I recommend mixing with distilled water in a gallon jug first as one of the components is very viscous and gets burped out somewhat by air getting displaced from the radiator by it.
    6 people found this helpful
    Helpful
     Report
    Sandy
    5.0 out of 5 stars Works
    Reviewed in the United States on June 27, 2023
    Size: 1 PackVerified Purchase
    I had a coolant leak at the firewall on a hose junction real hard to get to I tried a handful of products with varying results but when I used this stuff it sealed it up no leaks it's been about a month and it's still holding
    2 people found this helpful
    Helpful
     Report
    Amazon Customer
    1.0 out of 5 stars Clogged my radiator!
    Reviewed in the United States on April 5, 2024
    Size: 1 PackVerified Purchase
    Kept having to add coolant to my reservoir. Thought this might work to stop the leak, but it stopped up the radiator and I had to replace it. Had high hopes for this formula, but I was disappointed.
    Helpful
     Report
    Boat Bro Luis
    3.0 out of 5 stars Find your leak!
    Reviewed in the United States on November 1, 2017
    Size: 1 PackVerified Purchase
    After reading many reviews I decided to give this a shot since my radiator was leaking for a couple weeks from an unknown location. After purchase I used it in the reservoir and to my surprise the leak continued again for weeks. I also noticed that my radiator was no longer pulling coolant from its resivior. So I decided to take a peak and noticed the gunked up the hose going from the resivior tank to the radiator. And soon after I found the leak coming from a small return hose. So after finding this I flushed the system and replaced the hoses. So in my instance the Bar,s Leaks did not work for my but it might for you. Just be sure where you are leaking from is fixable with this.
    13 people found this helpful
    Helpful
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    bldyfinger
    5.0 out of 5 stars Works very well
    Reviewed in the United States on February 17, 2023
    Size: 1 PackVerified Purchase
    This was recommended on the Scotty Kilmore channel. I gave it a shot. I had a small leak sitting idle for 5 minutes about 1/8 cup. Bought this on Amazon in two day revived it stoped leak in one day. Will be watching it to see how long it works. Stay tuned.
    6 people found this helpful
    Helpful
     Report