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  
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. Product Features: 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
Boiling Point at 50/50 Mixture:219 deg F
Contains Corrosion Inhibitors:Yes
Contains Ethylene Glycol:No
Contains Lubricant:Yes
Contains Stop Leak:Yes
Lubricant Type:Water Wetter
Manufacturer Warranty Compatibility:Yes
Non-Toxic:No
Radiator Material Compatibility:All
Recommended Change Interval:12000 mi

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Bars LeakLiquid Aluminum Radiator Stop Leak (16.9 oz)
 
3.9

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (9)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (3)

79%

of respondents would recommend this to a friend.

Pros

  • Easy to use (8)
  • Reliable (3)

Cons

    Best Uses

    • Home garage (8)
      • 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 14 customers

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    Displaying reviews 1-10

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    4.0

    So far so good..

    By RIGuy

    from RI

    About Me Auto Enthusiast

    Level 1

    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.

      Comment on this review(earn points)

       
      5.0

      IT WORKED!

      By Kate

      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.

          Comment on this review(earn points)

           
          5.0

          Saved the day

          By Todd

          from Lexington SC

          About Me Auto Enthusiast, Mechanic

          Verified Buyer
          Level 1

          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.

            Comment on this review(earn points)

            (0 of 1 customers found this review helpful)

             
            3.0

            not a 100% fix for top of radiator leak

            By biggar

            from Utica, NY

            About Me Auto Enthusiast

            Verified Buyer
            Level 1

            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.

            Comment on this review(earn points)

            (1 of 2 customers found this review helpful)

             
            1.0

            worse off

            By Michigan mike

            from Michigan

            About Me Auto Enthusiast, Casual Driver

            Level 1

            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.

              Comment on this review(earn points)

              (0 of 1 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.

              Comment on this review(earn points)

              (4 of 7 customers found this review helpful)

               
              5.0

              This stuff really works

              By Val the nurse

              from Canton, GA

              About Me Casual Driver

              Verified Buyer
              Helpful Reviewer

              Pros

              • Easy To Use

              Cons

                Best Uses

                • Home Garage

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

                I used this in my sons 1994 Cutlass Supreme and it worked like a charm, If ever needed, i would buy it again.

                Comment on this review(earn points)

                (11 of 15 customers found this review helpful)

                 
                5.0

                Worked like a charm!

                By JohnnyZap

                from Lincoln, NE

                About Me Casual Driver

                Level 2

                Pros

                • Easy To Use
                • Reliable

                Cons

                  Best Uses

                  • Home Garage
                  • Roadside Repairs

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

                  My 1999 Ford Expedition's heater core began to leak rather badly. Called 3 mechanics and the price to fix was between $880.00 to $1,100.00 because in order to get to the heater core in a Ford, one must pull the dashboard and the center console. Everything must be disconnected including the AC lines. So a $100.00 heater core becomes a labor intensive job because of the basic bad design of most cars.
                  I picked up a bottle of Bar's Liquid Aluminum Radiator Stop Leak, poured it into the system and in less than 1 minute the leak stopped.
                  I just drove 220 miles in 98 degree heat with the AC on full and not a leak, not a dribble, not a drop.
                  This stuff really works!

                  Comment on this review(earn points)

                  (32 of 59 customers found this review helpful)

                   
                  5.0

                  it works

                  By forsaken

                  from Greeley, Co

                  Pros

                  • Easy To Use

                  Cons

                    Best Uses

                    • Home Garage

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

                    I had a pretty bad leak on my radiator in a 98 jeep grand cheerokee. Added this to radiator, then let engine idle for 20 mins. At bout 17 mins the leak has stopped. Nothing wrong with engine or nothing. When adding additives don't drive vechiles, idle them. If give additives proper time to do their job right.

                    Comment on this review(earn points)

                    (70 of 117 customers found this review helpful)

                     
                    5.0

                    Worked for me

                    By Chuck

                    from Rochester, NY

                    Pros

                    • Easy To Use

                    Cons

                      Best Uses

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

                        Used a full bottle on a 2.4L 4 cylinder engine and it stopped the leak. I was leary to use at first based upon the negative reviews.

                        Comment on this review(earn points)

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                        Do you have questions about this product?(earn points for answers!)

                         

                        Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                        20 Questions | 21 Answers
                        Displaying questions 1-10Previous | Next »
                        • 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
                        • Q:

                          93 Toyota MR2 - Q:With the radiator being up front and the coolant filler being in the rear of the car is it still as effective? or should I apply it a different way?
                          Asked on 1/23/2013 by ScottS from Aberdeen, MD

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Yes, this Bars Leak Liquid Aluminum Radiator Stop Leak - part# 1186 should work fine on your 1993 Toyota MR2. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

                            Answered on 1/23/2013 by Vincent from AAP
                        • Q:

                          Will this product work in 2004 BMW 325i?
                          Asked on 12/22/2012 by Erv from Atlanta

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Yes, this Bars Leak Liquid Aluminum Radiator Stop Leak - (Part No. 1186) will work in your 2004 BMW 325i as it is compatible with all types of water cooled vehicles. For more information, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                            Answered on 12/22/2012 by Aaron from AAP
                        • Q:

                          if i added stop leak and forgot to run engine for 10 minutes what the worse that can happen
                          Asked on 12/5/2012 by dave

                          1 answer

                          • CUSTOMER CARE

                            A:

                            If you have added Bars Leak Liquid Aluminum Radiator Stop Leak - Part No. 1186 and have not started the engine for 10 minutes, it will not offer its full efficiency. Bars Leaks particles will burn when subjected to the 5000 degree heat of the combustion chamber to seal head gasket seepage and small cracks which will not happen when you do not run the engine. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

                            Answered on 12/6/2012 by John the Car-Doc from AAP
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