Liquid Aluminum Radiator Stop Leak (16.9 oz)
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Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz)

Part No. 1186 Warranty Details  
Scientifically formulated to permanently seal coolant leaks that are the cause of most overheating problems. Liquid Aluminum is part of the next generation stop leak line which not only seal leaks, but also conditions the system. Contains Xtreme Cool which stops overheating and reduces water temperature. It is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. Works in cars, trucks, vans, SUVs and RVs. Use with all types of antifreeze including conventional green or blue (silicate-based) and extended-life red/orange or yellow (OAT/HOAT) antifreeze. For most vehicles, leaks stop in only a few minutes. Seals radiator leaks, Seals freeze plug leaks, Repairs gasket leaks, Repairs heater core leaks, Lowers water temperature, Use 1/2 bottle in a small cooling systems, such as those with 4 cylinders and no A/C; use 1 bottle for regular-size systems, including most 4-, 6-, 8- and 10-cylinder engines

Product Features:
  • Safely Seals Leaks
  • Stops Overheating
  • Reduces Water Temperature
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Antifreeze Type Compatibility:Compatiable with all antifreeze
Contains Corrosion Inhibitors:Yes
Contains Ethylene Glycol:No
Contains Lubricant:Yes
Contains Stop Leak:Yes
Lubricant Type:Water Wetter
Manufacturer Warranty Compatibility:Yes
Radiator Material Compatibility:All
Recommended Change Interval:12000 mi
Non-Toxic:No
Boiling Point at 50/50 Mixture:219 Deg. F

REVIEW SNAPSHOT®

by PowerReviews
Bars LeakLiquid Aluminum Radiator Stop Leak (16.9 oz)
 
3.7

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (11)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (5)

72%

of respondents would recommend this to a friend.

Pros

  • Easy to use (9)
  • Reliable (4)

Cons

No Cons

Best Uses

  • Home garage (9)
  • Roadside repairs (3)
    • Was this a gift?:
    • No (3)
    • Reviewer Profile:
    • Auto enthusiast (5), Casual driver (4)

Most Liked Positive Review

 

Liquid Aluminum WORKS!!!

I purchased a 2001 Expedition w/ ft and rear A/C CHEAP because of poor cooling system maint. Leaking heater cores.EXPENSIVE repair!! A cooling system flush, fill w50/50 mix and 2...Read complete review

I purchased a 2001 Expedition w/ ft and rear A/C CHEAP because of poor cooling system maint. Leaking heater cores.EXPENSIVE repair!! A cooling system flush, fill w50/50 mix and 2 bottles of Bars Liquid Aluminum.1 1/2 years and 17k miles later. Zero system leaks.It had been so bad the original owner had the heater system bi-passed.

VS

Most Liked Negative Review

 

Stop Leaks to Start Leaks

Stay away Bars Aluminum Stop Leak! Added it to my 97 Ram 1500 to hopefully seal a drip from the water pump... Next day my water pump is leaking worse than before,...Read complete review

Stay away Bars Aluminum Stop Leak! Added it to my 97 Ram 1500 to hopefully seal a drip from the water pump... Next day my water pump is leaking worse than before, and now it's in the shop. Certainly not worth the money.

Reviewed by 18 customers

Displaying reviews 1-10

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1.0

NEVER EVER AGAIN

By 

from Richmond virginia

Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

I bought this stuff to fix a small leak the people at the store said it was good. I followed the directions to a T yes it fixed the leak but a couple of days later the heat stopped working. I have 3 kids and we had to keep blankets on while going places it was so cold!!!! After paying to have everything flushed out replacing the radiator, heater controls, thermostat, water pump( BC that had locked up) and then finally taking a power washer BC the water hose just wasn't enough pressure to the heater core I finally had heat again. And after all of the unnecessary repairs. The only way I would recommend this to anyone is if I didn't like them..

  • Was this a gift?:
  • No
 
1.0

NEVER, EVER, EVER, AGAIN!!! STAY AWAY!!!!!

By 

from Knoxville, TN

Verified Reviewer

Pros

    Cons

    • clogs heater core innards

    Best Uses

      Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

      I bought this to stop a leaking radiator in an '03 Honda Element. I saw the few negative reviews, and thought "won't happen to me". Boy, was I WRONG!!! I followed directions on bottle, and the leak DID stop...TEMPORARILY!!!! Two days later and the leak was back. I ended up replacing the radiator myself (~$150) anyway. If had done that to begin with, I wouldn't now be spending over $900 to have the heater core replaced. Bottle says "...most trusted stop leak brand since 1947". Maybe heater cores were made differently then. Don't let a $6-$7 "quick fix" cost you $1000 TRUE fix!!!!! I would give "0" stars if I could, but I have to give at least 1 to do the review.

      • Was this a gift?:
      • No
       
      5.0

      Works extremely well!

      By 

      from Orange, NJ

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

      So far, so good. Keeping my fingers crossed...

      • Was this a gift?:
      • No

      (1 of 1 customers found this review helpful)

       
      5.0

      Emergency Roadside Fix

      By 

      from Huntsville, AL

      About Me Competitive Driver, Mechanic

      See all my reviews

      3 or more reviews submitted

      Pros

      • Easy To Use
      • Reliable

      Cons

        Best Uses

        • Automotive Repair Shop
        • Home Garage
        • Roadside Repairs

        Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

        This is an excellent product. I was stuck on side of the interstate last weekend with a pinhole leak in the radiator and all the antifreeze had ran out. Luckily I had a friend bring a bottle of Bars Radiator Stop Leak. It stopped the leak immediately after pouring it down the radiator hose and adding water. I drove 80mi home with no issues. Keep a bottle in your tool box for roadside fixes. A++

        (4 of 7 customers found this review helpful)

         
        4.0

        So far so good..

        By 

        from RI

        About Me Auto Enthusiast

        Helpful Reviewer

        Pros

        • Easy To Use

        Cons

          Best Uses

          • Home Garage

          Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

          Not wanting to spend a lot to keep my old Saab on the road I turned to this product for a small radiator leak. Very simple to use, just pour directly info to radiator (or in my case the coolant reservoir) and run/drive the car for 15 mins or so. It's only been about 2 weeks but my coolant level has been holding steady. May not solve large leaks but for smaller ones, it seems to do the trick.

          (6 of 9 customers found this review helpful)

           
          5.0

          IT WORKED!

          By 

          from Daytona Beach, FL

          About Me Casual Driver

          Pros

            Cons

              Best Uses

              • Home Garage

              Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

              I put in 2 bottles in radiator of my 98 v-6 3.8 Firebird and it STOPPED the major radiator leak.....I've driven it for 3 years and no leaks! Couldn't afford radiator replacement, great cheaper option to keep car running.

              (5 of 8 customers found this review helpful)

               
              5.0

              Saved the day

              By 

              from Lexington SC

              About Me Auto Enthusiast, Mechanic

              Verified Buyer
              Helpful Reviewer

              Pros

              • Easy To Use
              • Reliable

              Cons

                Best Uses

                • Home Garage
                • Roadside Repairs
                • Upkeep

                Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

                Stopped an unexpected, unplanned heater core leak on day one 1 a 3 day drive. Kept the leak sealed in the heater core for 9 months (my son was taking it to school) until it got back home where I could repair it. Also, the Bars helpline is very helpful. I do all of my own mechanic work (for 30 yrs) and I use this to stop the little annoying leaks that develop. I really just prolongs the time before a permanent fix is needed, but that time can be a long time and I have had no bad side effects with its use.

                (3 of 7 customers found this review helpful)

                 
                3.0

                not a 100% fix for top of radiator leak

                By 

                from Utica, NY

                About Me Auto Enthusiast

                Verified Buyer
                Helpful Reviewer

                Pros

                • Appears To Leak Less

                Cons

                • Get It All In

                Best Uses

                • Cheaper Than Radiator
                • Guaranteed

                Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

                make sure you have room enough to get all of the product in.

                (5 of 10 customers found this review helpful)

                 
                1.0

                worse off

                By 

                from Michigan

                About Me Auto Enthusiast, Casual Driver

                Helpful Reviewer

                Pros

                • Cost
                • Easy To Use

                Cons

                • Clogging
                • Not Effective

                Best Uses

                  Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

                  I tried this product as an alternative to replacing my leaking radiator in my 2003 Monte Carlo 3.4L. This product did not stop my leak but it did clog my heater core. I used half a bottle and it still clogged. The clog caused the flow of water to stop and my engine to overheat as well as leaving me without heat for the winter. I still have to replace my radiator and now my heater core. I might be able to unclog the blockage but this added several hours of work to what could have been a fairly simple job.

                  (3 of 7 customers found this review helpful)

                   
                  5.0

                  Helps if leak is slight

                  Comments about Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz):

                  Worth trying, but if leak is bad, you will need a new radiator.

                  Displaying reviews 1-10

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                  Do you have questions about this product?

                   

                  Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

                  23 Questions | 24 Answers
                  Displaying questions 1-10Previous | Next »
                  • Q:

                    i am confused. Which is better? Liquid Aluminum, liquid copper or regular Bars Leak? Why have 3?
                    Asked on 10/30/2016 by Keith from Lincoln Nebraska.

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Hi Keith, glad to assist you! I don't see much difference between these Liquid Aluminum, liquid copper or regular Bars Leak. All these products are guaranteed to safely and easily seal leaks in plastic, aluminum and metal radiators, heater cores, gaskets and freeze plugs. For more information, I would suggest that you contact the Bar's Leak directly at 1-800-345-6572 and they would be in a better position to help you.

                      Answered on 11/3/2016 by Steve from AAP
                  • Q:

                    Good Afternoon will this work on a Pontiac Torrent 2007 I have a small leak in the heater core which is causing me to smell anti freeze inside of the car?
                    Asked on 10/10/2016 by Stacie from Monroe, NC

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Hi Stacie, happy to help you! This Bars Leak Liquid Aluminum Radiator Stop Leak (16.9 oz) (Part No. 1186) is universal and not vehicle specific. Bar's Leaks® Liquid Aluminum™ Cooling System / Radiator Stop Leak product is part of the next generation stop leak line which is certified to be used in all cooling system types. It is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. 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.

                      Answered on 10/12/2016 by Steve from AAP
                  • Q:

                    1994 BMW 325ic - There is a cap for the cooling system overflow tank. Is there also a cap to the radiator. If there is not a specific radiator cap, can this product be poured into the overflow tank?
                    Asked on 1/21/2016 by Larry from United States

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Yes, Larry, If direct access to the radiator cap is not available, you can very well pour into the overflow/reservoir tank.

                      Answered on 1/22/2016 by Steve from AAP
                  • Q:

                    coolant leakage form fins,how to stop?
                    for usage bars leak any solution for stoping the coolant leakage?
                    how to use the Bar leak?
                    Asked on 4/8/2014 by hanum from hyderabad

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Hi Hanum, tricky question! Kindly follow the instructions to use this Bars Leak Liquid Aluminum Radiator Stop Leak on your radiator. Allow your engine to cool. Make sure engine is cool enough so radiator cap can be safely removed. Shake Liquid Aluminum™ well and pour it directly into radiator. One bottle treats systems up to 4 gallons, so use ½ bottle for four cylinder engines. Fill radiator and overflow tank to proper level and re-install the radiator cap. Drive/idle your engine for 10 to 20 minutes. If leak continues, second application may be required or mechanical attention is needed. For severe leaks, like a blown head gasket, it is recommended to use Bar’s Leaks Head Gasket Fix or Head Gasket & Cooling Sealant. Leave BAR’S LEAKS Liquid Aluminum in the cooling system for continued protection. This product may help, but I would always recommend fixing the problem by finding out exactly the cause of leak and then replacing the necessary parts.

                      Answered on 4/9/2014 by Vincent from AAP
                  • Q:

                    how long before this product work on a freeze plug leak
                    Asked on 8/5/2013 by paul from wpb fl

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Bars recommend that this Bars Leak Liquid Aluminum Radiator Stop Leak - part# 1186 stops leaks in a few minutes. However, I would always recommend fixing the problem by finding out exactly the cause of leak and then replacing the necessary parts. For any further assistance, you may also call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 8/5/2013 by Vincent from AAP
                  • Q:

                    1997 Camry 2.2 L: Leaking in Heater Core

                    My car is still leaking from heater core after applying one bottle of "Radiator Stop Leak 2X Concentrate" (6oz). Can I apply "Liquid Aluminum™ Cooling System Stop Leak" (16.9 oz) without flush the cooling system.

                    Can I mix these two products in the same cooling system? Or I shall give another try to buy "Radiator Stop Leak 2X Concentrate"?

                    Thanks.
                    Asked on 7/13/2013 by JACK from fairfax, va

                    1 answer

                    • CUSTOMER CARE

                      A:

                      I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 7/15/2013 by Steve from AAP
                  • Q:

                    hello,
                    i have a 98 civic with leaking water pump after i replaced the radiator from OEM to 3 rows aluminum plus new hose+thermostat,will this thing fix the leak on the water pump?
                    Asked on 7/7/2013 by jason from montebello ca

                    1 answer

                    • CUSTOMER CARE

                      A:

                      This Bars Leak Liquid Aluminum Radiator Stop Leak - Part No. 1186 fix the leak on water pump temporarily, we always recommended to replace the leaky water pump. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 7/7/2013 by Morgan from AAP
                  • Q:

                    I have a tiny leak in my radiator I mean couple drops here n there is this a good product?
                    Asked on 6/5/2013 by nikki from 60477

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Kindly follow the instructions to use this Bars Leak Liquid Aluminum Radiator Stop Leak - Part No. 1186 on your radiator. Allow your engine to cool. Make sure engine is cool enough so radiator cap can be safely removed. Shake Liquid Aluminum™ well and pour it directly into radiator. One bottle treats systems up to 4 gallons, so use ½ bottle for four cylinder engines. Fill radiator and overflow tank to proper level and re-install the radiator cap. Drive/idle your engine for 10 to 20 minutes. If leak continues, second application may be required or mechanical attention is needed. For severe leaks, like a blown head gasket, it is recommended to use Bar’s Leaks Head Gasket Fix or Head Gasket & Cooling Sealant. Leave BAR’S LEAKS® Liquid Aluminum™ in the cooling system for continued protection. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 6/5/2013 by Morgan from AAP
                  • Q:

                    Can I use this in a v-twin bike radiator?
                    Asked on 3/27/2013 by Jamie from Colchester il

                    1 answer

                    • CUSTOMER CARE

                      A:

                      The Bars Leak Liquid Aluminum Radiator Stop Leak (Part No. 1186) works in cars, trucks, vans, SUVs and RVs. It is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 3/27/2013 by Steve from AAP
                  • Q:

                    Will this work on a freeze plug? And do you have to flush the system after.
                    Asked on 2/10/2013 by James from Longview

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Yes, this Bars Leak Liquid Aluminum Radiator Stop Leak - part# 1186 should work fine for your application as it is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. It is not necessary to flush the system after using this stop leak. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                      Answered on 2/11/2013 by Vincent from AAP
                  Displaying questions 1-10Previous | Next »

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