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Bar's Leaks 1196 Radiator Stop Leak - 11 oz. , Grey

4.3 4.3 out of 5 stars 378 ratings
$7.59 with 13 percent savings
Typical price: $8.71

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Purchase options and add-ons

  • STOPS & SEALS COOLANT LEAKS: Specially designed to stop minor cooling system leaks and drips caused by normal cooling system wear and age.
  • SEALS LEAKS IN RADIATORS, GASKETS, HEATER CORES & FREEZE PLUGS: Use one bottle for regular size cooling systems; this covers most 6 and 8 cylinder passenger vehicles and light trucks. Use 1/2 bottle for four cylinder engines.
  • WORKS WITH ALL TYPES AND COLORS OF ANTIFREEZE COOLANT AND / OR WATER: Including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.
  • Works with all types and colors of anti-freeze coolant
  • Stops and seals coolant leaks
  • One bottle treats up to 4 gallons
› See more product details

There is a newer model of this item:

Bar's Leaks Radiator Stop Leak, 11 oz
Bar's Leaks Radiator Stop Leak, 11 oz
$8.44
Only 12 left in stock (more on the way).

Frequently bought together

Bar's Leaks 1196 Radiator Stop Leak - 11 oz. , Grey
$7.59
Get it as soon as Wednesday, May 29
Only 15 left in stock - order soon.
Sold by G.P.S. and ships from Amazon Fulfillment.
+
Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA, Light Yellow/Green.
$14.99
Get it as soon as Tuesday, May 28
In Stock
Ships from and sold by Amazon.com.
+
Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz
$7.94
Available to ship in 1-2 days
Ships from and sold by Amazon.com.
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From the manufacturer

LEGENDARY PERFORMANCE FORMULAS Since 1921
Stop leak

Frequently Asked Questions...

Will Bar’s Leaks plug my heater core?

No, Bar’s Leaks Radiator Stop Leak will not clog a clean heater core. Note: If using Bar’s Leaks to stop heater core leaks, make sure you turn your heater control to HOT. Some vehicles have a valve that controls coolant flow through the core and is only opened in the HOT position.

What are the dosage recommendations?

Use one bottle for regular size cooling systems; this covers most 6, 8 and 10 cylinder engines. Use 1⁄2 bottle for four cylinder engines. One bottle treats up to 4 gallons. For larger systems use 1 bottle for every 4 gallons of capacity.

How long does it take to see results?

We recommend you drive/idle the vehicle for 15 to 30 minutes. In most cases the leak will be sealed instantly, but others will require up to 30 minutes. If the leak is not sealed in 30 minutes, a second application may be required or mechanical repair may be needed.

  • Specially designed to stop minor cooling system leaks caused by cooling system wear and age.
  • It works with ALL types and colors of antifreeze coolant and/or water.
Low Coolant Levels? Something smells sweet or funky? Hearing Loud Sounds from the Engine? Warning light due to Overheating? Smoke from the engine?
See Details
See Details
Customer Reviews
4.3 out of 5 stars
378
4.3 out of 5 stars
1,048
4.3 out of 5 stars
2,212
4.3 out of 5 stars
378
4.3 out of 5 stars
3,377
Price — $7.97 $12.98 — $7.94
Identify the Symptoms My radiator levels are low even with topping off the coolant every month. I'm seeing excessive moisture on the inside of the windshield or on the car mats in the foot wells. I'm hearing a ticking or knocking sound coming from the top of my engine. Radiator is making hissing sounds after the engine is turned off. I'm seeing white smoke or steam coming from engine/hood
Best Solution Bar’s Leaks Radiator Stop Leak Bar's Leaks Block Seal Liquid Copper Intake and Radiator Stop Leak Bar's Leaks Engine Repair. Bar’s Leaks Radiator Stop Leak Bar's Leaks Liquid Aluminum Stop Leak
Alternative Solutions Bar's Leaks Cooling System Repair. 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 Radiator Stop Leak
Bar's Leaks logo

Made in the United States

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 Radiator Stop Leak Concentrate is specially designed to stop minor cooling system leaks and drips caused by normal cooling system wear and age. Works with ALL Types and Colors of Antifreeze Coolant and / or Water

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.
Product Warranty: For warranty information about this product, please click here

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Bar's Leaks 1196 Radiator Stop Leak - 11 oz. , Grey

Bar's Leaks 1196 Radiator Stop Leak - 11 oz. , Grey

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What's in the box

  • One bottle

    • Product guides and documents

    User Guide (PDF)
    User Manual (PDF)

    Looking for specific info?

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    378 global ratings

    Customers say

    Customers like the performance of the auto accessory. For example, they say it works well and is a great product. That said, opinions are mixed on leakage.

    AI-generated from the text of customer reviews

    17 customers mention12 positive5 negative

    Customers like the performance of the auto accessory. They say it works pretty well, is a great product, and will work on most radiators.

    "Works great, just follow the directions." Read more

    "The stuff works. I put it in a 2006 Chrysler Town & Country with over 260,000 miles, haven’t had a problem since I put it in, highly recommend it." Read more

    "Sucked didn't work at all dont wasn't the money on it" Read more

    "It is a great product and will work on most radiators my dad has been using that back in the '70s and 80s and it is still good" Read more

    13 customers mention9 positive4 negative

    Customers are mixed about the leakage of the auto accessory. Some mention that it has stopped the leak immediately, while others say that it still leaks notably.

    "...So far, there is no more leak." Read more

    "Very happy with this product. Sealed the leak immediately and has stayed sealed !" Read more

    "...as I did my research, but followed the directions and so far it fixed the leak and is working great!..." Read more

    "...Its been over a month and still no Leak. The product worked perfectly." Read more

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    Top reviews from the United States

    Barry becker
    5.0 out of 5 stars Stop Leaks
    Reviewed in the United States on March 19, 2024
    Size: Pack of 1Verified Purchase
    Works great, just follow the directions.
    Helpful
     Report
    AWB
    5.0 out of 5 stars It Work For Other Than Radiators
    Reviewed in the United States on November 20, 2023
    Size: Pack of 1Verified Purchase
    We have a waterfall made out of lava rock. Lava rock can be quite porous. The water reservoir is in the bottom of a large lava rock. Tarred the inside as best could to reduce leakage. Still leaked notably. Decided to try Bar's Leak. Very pleased with the results. The leakage greatly reduced. Likely most of the reduction in water quantity is due to evaporation.
    Helpful
     Report
    Commdrdave
    4.0 out of 5 stars Working for me to buy me some time
    Reviewed in the United States on March 21, 2020
    Size: Pack of 1Verified Purchase
    Since I have a 2003 vehicle and have taken care of it, it is giving me more time to keep driving and loosing fluid is not that much. Think sometime later will have to rebuild everything.
    Helpful
     Report
    Darin2470
    5.0 out of 5 stars Yes
    Reviewed in the United States on November 21, 2023
    Size: Pack of 1Verified Purchase
    The stuff works. I put it in a 2006 Chrysler Town & Country with over 260,000 miles, haven’t had a problem since I put it in, highly recommend it.
    Helpful
     Report
    BROKENECK PERFORMANCE
    3.0 out of 5 stars Quality
    Reviewed in the United States on February 28, 2024
    Size: Pack of 1Verified Purchase
    Not the same as original
    Helpful
     Report
    George Etter
    5.0 out of 5 stars Great product
    Reviewed in the United States on October 13, 2023
    Size: Pack of 1Verified Purchase
    It is a great product and will work on most radiators my dad has been using that back in the '70s and 80s and it is still good
    Helpful
     Report
    Gmac
    5.0 out of 5 stars Stubborn leak fixed.
    Reviewed in the United States on August 8, 2022
    Size: Pack of 1Verified Purchase
    I usually don't put much stock into stop leaks. If you're using one then you already have a problem. Well the thing is, I replaced my radiator where the leak was. Problem solved. Now I have a leak from the lower radiator hose to the motor. I couldn't find the "sweet spot" for the clamp and it just kept leaking. No matter where I put it. One would think that it's leaking from the water pump. Pump is fine, got a leak around the hose. Moved clamp up, leaked less, move clamp over to the flange, leaked more. Within six minutes of using this my leak is gone. If you have a small leak that's driving you up the wall. This'll fix it.
    Helpful
     Report
    Mikeal C.
    1.0 out of 5 stars Sucks
    Reviewed in the United States on February 28, 2022
    Size: Pack of 1Verified Purchase
    Sucked didn't work at all dont wasn't the money on it
    Helpful
     Report

    Top reviews from other countries

    Kelly Krause
    5.0 out of 5 stars Works
    Reviewed in Canada on May 24, 2020
    Size: Pack of 1Verified Purchase
    Works
    Report
    Raj
    1.0 out of 5 stars Minor leak didnt stop. Waste of time and money!!
    Reviewed in India on January 16, 2021
    Size: Pack of 1Verified Purchase
    Minor leak didnt stop. Waste of time and money!!
    Please refund my amount.
    Report
    allen stevenson
    4.0 out of 5 stars Fast shipping
    Reviewed in Canada on August 10, 2020
    Size: Pack of 6Verified Purchase
    Did not work on fairly large leak
    Report