Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.)
Hover over the image to zoom in
Share this:

Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.)

Part No. 1109 Warranty  
Bar's Leaks Liquid Copper& Block Seal Intake and Radiator Stop Leak is formulated to seal larger leaks permanently on cars, trucks, vans, SUVs and RVs. Product Features: Permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs, Compatible with virtually all types of antifreeze, including silicate-based conventional green and blue and extended-life red/orange and yellow (OAT/HOAT) coolant, Contains an antifreeze-compatible sodium silicate liquid glass formula, so no draining of the cooling system is required, 1 bottle treats most 4-, 6-, 8- and 10-cylinder engines

Product Features:
  • Seals larger leaks Seals
  • Repairs Heater Core Leaks
  • Repairs Freeze Plugs
  • Repairs Block Leaks
Back To Top
Antifreeze Type Compatibility:Compatiable with all antifreeze
Boiling Point at 50/50 Mixture:104 deg F
Contains Corrosion Inhibitors:No
Contains Ethylene Glycol:No
Contains Lubricant:No
Contains Stop Leak:Yes
Cooling System Efficiency Increase:No
Lubricant Type:None
Manufacturer Warranty Compatibility:Yes
Non-Toxic:Yes
Radiator Material Compatibility:All
Recommended Change Interval:12000 mi

REVIEW SNAPSHOT®

by PowerReviews
Bars LeakLiquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.)
 
3.8

(based on 29 reviews)

Ratings Distribution

  • 5 Stars

     

    (15)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (4)

79%

of respondents would recommend this to a friend.

Pros

  • Easy to use (19)
  • Reliable (11)
  • Can withstand use (5)
  • Compact (5)

Cons

    Best Uses

    • Home garage (15)
    • Roadside repairs (12)
    • Automotive repair shop (5)
      • Reviewer Profile:
      • Casual driver (6), Auto enthusiast (3)
      • Reviewer Profile:
      • Casual driver (7), Auto enthusiast (6), Mechanic (6), Truck enthusiast (4)

    Most Liked Positive Review

     

    So far, so good

    For a while my 1999 Chevy Blazer leaked coolant, at first just a few drops a week. Then it progressed to me being able to see coolant coming out from under the car onto...Read complete review

    For a while my 1999 Chevy Blazer leaked coolant, at first just a few drops a week. Then it progressed to me being able to see coolant coming out from under the car onto the ground after shutting the car off. My monthly routine of adding coolant to the reservoir and radiator turned into a weekly routine, at least. We will have this car paid off in February of 2011 and have already dumped a ton of money into it. My mantra for the last few months has been to spend no more big money on this thing. Just hold it together until it is paid off, at least.

    As time went on I would add coolant to the reservoir, drive it around long enough for the engine to get hot (has not overheated) and then returned home. I check the reservoir and poof, all fluid is gone, even minutes after coming home. All on the driveway.

    I went to Advance Auto and got Bars Stop Leaks, part #1109: Turn engine off and wait until it is cool enough to take Radiator cap off. Then, pour entire contents into radiator. This took longer than I would have thought, like 5 minutes, as the stuff is pretty thick. Then, top off with anti-freeze, which I was unable to do at first because the treatment is thick and takes a while to move. So I just put in as much anti-freeze as possible in radiator and also top off reservoir. Put the radiator cap back on. Turn heat on high and all the way into the red (hottest heat) then turn car on. Run for 5 minutes straight with heat on high. Then, turn car off, and when engine is cool enough, check radiator and top off fluid in both reservoir and radiator, as the 5 minutes with the heat on has allowed everything to circulate. I topped everything off on Saturday. It is now Monday and I have not seen a drop of anti-freeze and even the smell has disappeared. It has only been 2 days, so who knows. And for $3.00 or so I will continue to do this again and again if need be. But I am hopeful that this will work.

    VS

    Most Liked Negative Review

     

    Wont Stop Severe Intake Leaks

    I used this product in an attempt to stop an intake manifold gasket leak on a GM 3.1L V6 in a 1994 Buick Skylark. Initially it appeared to stop the leak but unfortunately when...Read complete review

    I used this product in an attempt to stop an intake manifold gasket leak on a GM 3.1L V6 in a 1994 Buick Skylark. Initially it appeared to stop the leak but unfortunately when the car was driven several miles the following day the leak worsened and the engine overheated resulting in head gasket leaks.

    This product may work for minor coolant leaks but it doesn't seem up to the task of sealing serious leaks.

    Reviewed by 29 customers

    Sort by

    Displaying reviews 1-10

    Back to top

    Previous | Next »

    (1 of 1 customers found this review helpful)

     
    5.0

    IT WORKS!

    By Terry

    from Danville, PA

    About Me Auto Enthusiast, Mechanic, Professional driver, Truck Enthusiast

    Level 1

    Pros

    • Easy To Use

    Cons

      Best Uses

      • Automotive Repair Shop
      • Home Garage
      • Roadside Repairs

      Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

      My 2001 Buick Century had been reliable transportation for members of my family since it was brand new. I recently invested new brakes, exhaust, suspension pasts, etc., into this car so my daughter could use it to commute to school. As soon as I put these parts into the car, it started raining coolant from out behind the timing cover. Now my girls college ride was worth about 10 cents per pound at the local recycler. Before I drove the Buick 3.1L V6 to the scrap yard, I took a shot at using Bar's Leaks Liquid Copper to seal the hidden hard to reach leak. I had used Bar's Leaks products in the past with success for minor radiator leaks but I had never heard of Liquid Copper or tried to seal this big a leak. For about 10 bucks, I thought why not give it a try. It was easy to use and IT WORKED! This engine is bone dry! No more coolant raining out from behind the timing cover! If you have a hard to reach, labor intensive / expensive coolant leak, give Bar's Leaks Liquid Copper a try. For me, it was like money in the bank!

      Comment on this review(earn points)

      (0 of 1 customers found this review helpful)

       
      5.0

      Works as advertised

      By 02Bonneville

      from Connecticut

      About Me Mechanic

      Pros

      • Simple And Very Effective

      Cons

      • None

      Best Uses

      • Automotive Repair Shop
      • Home Garage

      Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

      New intake manifold gaskets started leaking again after 18,000 miles, luke warm heat, smell coming from vents. One bottle into the radiator and blazing heat with no more smell.

      Comment on this review(earn points)

      (1 of 1 customers found this review helpful)

       
      5.0

      Works Great!!!!

      By Drew

      from Spring Hill, FL

      About Me Auto Enthusiast, Mechanic, Truck Enthusiast

      Pros

      • Can Withstand Use
      • Easy To Use
      • Reliable

      Cons

      • None

      Best Uses

      • Home Garage
      • Roadside Repairs

      Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

      I had a real bad leak did not know if it was head gasket or crack in head or cylinder. Had a lot of water coming out the exhaust, and had to add a quart every 25 miles. But either which , this stopped the leak. This stuff works great!! I added it to the coolant overflow tank, it takes a little while longer for it to circulate through the system but well worth it. I did not have money for new head gasket but if it was a crack, i would of wasted money. SO now there is no more water getting into the cylinder,it was fouling the plugs real bad too. Now i actually have pressure in the cooling system, and my car runs about 20 degrees cooler.

      Comment on this review(earn points)

      (5 of 8 customers found this review helpful)

       
      4.0

      First time using this type of product

      By Sam

      from York, pa

      About Me Casual Driver, Mechanic

      Verified Buyer
      Level 3

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Home Garage

        Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

        I was skeptical at first on trying this. But I do not have the money to fix a small leak right now. The garage wanted $1000 to do it. I put this in and ran the engine as required. It has been three weeks and I no longer smell the anti freeze when I get out of my vehicle.

        Comment on this review(earn points)

        (4 of 7 customers found this review helpful)

         
        5.0

        Great product

        By Johnnie Watkins

        from Rocky Mount, VA

        About Me Auto Enthusiast, Truck Enthusiast

        Level 5

        Pros

        • Can Withstand Use
        • Easy To Use
        • Reliable

        Cons

          Best Uses

          • Automotive Repair Shop
          • Home Garage
          • Roadside Repairs

          Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

          Had a small hole in a copper core radiator that was spraying coolant at the fan. Poured this product in, let it idle for 15-20 mins, drove it a couple miles and months later the leak is still sealed. I even had to drain the system recently for a new water pump and the product is still holding.

          Comment on this review(earn points)

          (4 of 8 customers found this review helpful)

           
          2.0

          job well done

          By butterfli32

          from pensacola, fl.

          About Me Casual Driver

          Ask me a question

          Verified Buyer
          Level 2

          Pros

          • Easy To Use

          Cons

          • Heavy

          Best Uses

          • Roadside Repairs

          Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

          Easy to use

          Comment on this review(earn points)

          (3 of 9 customers found this review helpful)

           
          1.0

          Did not work for me.

          By George

          from Fayetteville, NC

          About Me Mechanic

          Helpful Reviewer

          Pros

            Cons

              Best Uses

                Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

                I followed the instructions and my leak never slowed down.

                Comment on this review(earn points)

                (3 of 12 customers found this review helpful)

                 
                1.0

                Made leak worse

                By Sparky

                from L.I.

                About Me Casual Driver

                Pros

                  Cons

                  • Leak Became Worse
                  • Only Worked For A Week

                  Best Uses

                    Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

                    Waste of time & money

                    Comment on this review(earn points)

                    (5 of 9 customers found this review helpful)

                     
                    1.0

                    it did not work

                    By Sam

                    from Florida

                    Verified Buyer
                    Helpful Reviewer

                    Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

                    It did not plug the leak in my radiator

                    Comment on this review(earn points)

                    (9 of 13 customers found this review helpful)

                     
                    5.0

                    Works on Ford timing cover leak

                    By Tom

                    from Richmond, Virginia

                    Ask me a question

                    Verified Buyer
                    Level 2

                    Comments about Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.):

                    Used on a Ford 3.8L v-6 with the notorious timing cover leak. Works well. Needs to be replenished when coolant is changed. Can also plug radiator cap and create excessive pressure. Clean radiator cap periodically and all will be fine.

                    Comment on this review(earn points)

                    Displaying reviews 1-10

                    Back to top

                    Previous | Next »

                    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.

                    28 Questions | 32 Answers
                    Displaying questions 1-10Previous | Next »
                    • Q:

                      can this be used for a radiator that is leaking water from either a crack or something in the radiator? I have to fill it with water everytime I leave anywhere and cant go to far without having to fill it up with water again. it leaks fairly fast but sometimes it doesn't leak but maybe the gunk and dirt seals it. so hopefully this stuff will work.
                      Asked on 3/16/2014 by cory from beaumont,ca

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Cory, tricky question! This Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak 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 3/18/2014 by Vincent from AAP
                    • Q:

                      Will this product work on a Lexus GS300 which has a plastic radiator???
                      Asked on 2/21/2014 by Dallas from Alexandria, LA

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Dallas, good question! This radiator stop leak 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 2/24/2014 by Vincent from AAP
                    • Q:

                      can this help seal a coolant engine block seal. and how do I put it in. can I do it with an empty system
                      Asked on 1/27/2014 by rony

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Rony, this radiator stop leak 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 1/28/2014 by Vincent from AAP
                    • Q:

                      Will This Help Fix A Leaking Heater Core ?????
                      Asked on 11/27/2013 by cuz from Carbon Hill Alabama

                      1 answer

                      • CUSTOMER CARE

                        A:

                        I'm glad I could be of assistance! This Bars Leak Liquid Copper will permanently repair larger leaks in your heater core. I have forwarded the "Technical Data Sheet" to your email address.

                        Answered on 11/28/2013 by Morgan from AAP
                    • Q:

                      can this be used if your heater core is bypassed
                      Asked on 9/15/2013 by odie from pinellas park,fl

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Yes, the Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) can be used if the heater core is bypassed. 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 9/16/2013 by Steve from AAP
                    • Q:

                      1997 dodge intrepid 3.3liter freeze plug leaking which one of your products should I buy?? and how long before leak stops??
                      Asked on 8/5/2013 by paul from west palm beach fl

                      1 answer

                      • CUSTOMER CARE

                        A:

                        This Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) -part# 1109 may help. However, I would always recommend fixing the problem by finding out exactly the cause of leak and then replacing the necessary parts in order to avoid intermittence. 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 8/6/2013 by Vincent from AAP
                    • Q:

                      will this stuff fix a antifreeze leak coming out of a bolt by the head gasket or intake manifold?
                      Asked on 6/7/2013 by alex klen from Meriden, KS

                      1 answer

                      • CUSTOMER CARE

                        A:

                        This Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - Part No. 1109 is formula permanently repairs larger leaks in radiators, intake manifolds & gaskets, heater cores, blocks, heads and freeze plugs use on cars, trucks, vans, SUV’s and RV’s. 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 6/8/2013 by Morgan from AAP
                    • Q:

                      if i pour the whole bottle into the overflow tank will it get into the cooling system?
                      Asked on 6/1/2013 by rick from mattapoisett,ma.

                      1 answer

                      • CUSTOMER CARE

                        A:

                        For best results Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - Part No. 1109 should not be installed in a regular overflow tank unless it has a screw on pressurized cap. If you do not have access to your radiator, remove top hose where it connects to the top of the radiator and install product in hose. Reattach hose and tighten clamp. For any further assistance please feel free to call 1-877-238-2623 and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                        Answered on 6/3/2013 by John the Car-Doc from AAP
                    • Q:

                      OIL LEAKS ON OIL COOLING LINES AND POSSIBLE INTAKE MANIFOLD GASKET,WILL THIS PRODUCT FIX THIS PROBLEM,LEAKS R SMALL.
                      Asked on 5/30/2013 by Domenic from Daytona Bch

                      1 answer

                      • CUSTOMER CARE

                        A:

                        This Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - Part No. 1109 is permanently repairs larger leaks in radiators, intake manifolds & gaskets, heater cores, blocks, heads and freeze plugs. Use on cars, trucks, vans, SUV’s and RV’s. 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 5/31/2013 by Morgan from AAP
                    • Q:

                      I have oil getting in to the radiator.Will this fix this kind of leak.
                      Asked on 4/22/2013 by lead foot

                      1 answer

                      • CUSTOMER CARE

                        A:

                        The Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) is formulated to seal larger leaks permanently on cars, trucks, vans, SUVs and RVs. Product Features: Permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads 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 4/23/2013 by Steve from AAP
                    Displaying questions 1-10Previous | Next »

                    Do you have a question about this product? 

                    Create or view your online garage

                    Check out the specials in our monthly flyer

                     
                     
                    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.