Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.)
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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
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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.)
 
3.7

(based on 26 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (4)

76%

of respondents would recommend this to a friend.

Pros

  • Easy to use (17)
  • Reliable (10)
  • Compact (5)
  • Can withstand use (4)

Cons

    Best Uses

    • Home garage (12)
    • Roadside repairs (10)
    • Automotive repair shop (3)
      • Reviewer Profile:
      • Casual driver (6), Auto enthusiast (3)
      • Reviewer Profile:
      • Casual driver (7), Auto enthusiast (4), Mechanic (3)

    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 the...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 26 customers

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    4.0

    First time using this type of product

    By Sam

    from York, pa

    About Me Casual Driver, Mechanic

    Verified Buyer
    3 or more reviews submitted

    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)

       
      5.0

      Great product

      By Johnnie Watkins

      from Rocky Mount, VA

      About Me Auto Enthusiast, Truck Enthusiast

      Level 4

      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)

        (2 of 3 customers found this review helpful)

         
        2.0

        job well done

        By butterfli32

        from pensacola, fl.

        About Me Casual Driver

        Verified Buyer
        Level 1

        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)

        (1 of 2 customers found this review helpful)

         
        1.0

        Did not work for me.

        By Lightning

        from Fayetteville, NC

        About Me Mechanic

        Level 1

        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)

              (1 of 3 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)

                  (2 of 3 customers found this review helpful)

                   
                  1.0

                  it did not work

                  By Sam

                  from Florida

                  Verified Buyer
                  Level 1

                  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)

                  (3 of 5 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)

                  (4 of 6 customers found this review helpful)

                   
                  4.0

                  Good product!

                  By KCDriver

                  from Kansas City, MO

                  About Me Auto Enthusiast

                  Verified Buyer
                  Helpful Reviewer

                  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 used this product as directed and it has dramatically slowed the coolant leaks in my Chevy Venture. I've already been burned with all the gasket replacements on a Chevy Lumina and I'm not paying for that again. I purchased the liquid copper since it was marked "intake" but it turns out now my problem is probably a head gasket instead, doesn't matter it has made a huge improvement anyway. I also e-mailed some questions to Bar's Leaks and got great, prompt responses. If I'd known I was dealing with a head gasket I'd have used the heavier duty "Head Gasket Fix" instead. Bar's Leaks makes good stuff and I've had positive experiences with their products before, so this time when I was looking for help I went straight to Bar's Leaks and looked no further.

                    Comment on this review(earn points)

                    (40 of 92 customers found this review helpful)

                     
                    5.0

                    Wonderful product ,will buy agian

                    By Lion King

                    from ohio

                    About Me Auto Enthusiast, Casual Driver

                    Verified Buyer
                    3 or more reviews submitted

                    Pros

                    • Easy To Use
                    • Works quick

                    Cons

                    • None

                    Best Uses

                    • Home Garage
                    • Roadside Repairs

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

                    Had a bad leak in radiator didnt think this would do the job but hey [$] bucks made it worth a try! I worked just like it said in all the reviews I could find online .

                    Comment on this review(earn points)

                    (49 of 97 customers found this review helpful)

                     
                    3.0

                    It didn't fix my heater coil

                    By Rusty Shackleford

                    from Asheville

                    About Me Casual Driver

                    Verified Buyer
                    Level 2

                    Pros

                    • Compact Design
                    • Easy To Use

                    Cons

                    • Didn't work

                    Best Uses

                    • Upkeep

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

                    This didn't fix the leak in my heater core. I had seen and smelled antifreeze evaporating in through my front vents, and got this to hopefully avoid a costly repair. I think mine might have been too far gone, though. It seemed to work well enough when I put it in. For about two weeks, there was very little evaporation. But today it was billowing out much heavier than it was before. I don't think it's a problem with the product itself although it may not be particularly suited to heater cores over some other parts, but it's a complete bust for me.

                    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.

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

                      will this work on inline 4 motorcycles
                      Asked on 2/11/2013 by Kyle

                      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 only on cars, trucks, vans, SUVs and RVs. 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 Steve from AAP
                    • Q:

                      How many bottles or oz. of liquid copper block seal will it take for a 9 gallon system? I have a large radiator leak. Will this clog my system?
                      Asked on 1/10/2013 by LIGHTNING from fAYETTEVILLE, NC

                      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, 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. For further assistance, 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 1/11/2013 by Steve from AAP
                    • Q:

                      I dont have a radiator cap on my 2002 ford f150 v6. How do i get this stuff into my radiator? Can I pour it into the coolant resevoir????
                      Asked on 12/14/2012 by rcb

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Yes, you can use the Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - Part No. 1109 in the coolant reservoir on your 2002 Ford F150 V6. 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 12/17/2012 by John the Car-Doc from AAP
                    • Q:

                      I have small leak coming from my water pump seal I believe in my 1998 trans am will this seal the leak sence it's a real small leak
                      Asked on 10/26/2012 by Duce from New orleans.la

                      1 answer

                      • CUSTOMER CARE

                        A:

                        This Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - part# 1109 may help but 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, 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 10/26/2012 by Vincent from AAP
                    • Q:

                      My radiator leak seams to be at the top of my radiator; the part that the radiator cap is attached to. Will it stop a leak that high up?
                      Asked on 10/16/2012 by Bob from Charlotte, NC

                      1 answer

                      • CUSTOMER CARE

                        A:

                        This Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) - part# 1109 seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. This may work. However, 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, you may also 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 10/16/2012 by Vincent from AAP
                    • Q:

                      Can I pour this product into the reservoir?
                      Asked on 3/13/2012 by Skip from Salisbury, NC

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Yes, you can pour this Bars Leak Liquid Copper™ Block Seal Intake and Radiator Stop Leak (18 oz.) Part number 1109 into the reservoir tank and this product is specifically designed to be directly added to the cooling system.

                        Answered on 3/13/2012 by Steve from AAP
                    • Q:

                      I have a 1998 BMW 740I, and white smoke is coming from exhuast. I was told that I have a blown head gasket.
                      Will this serve as a any kind of fix? (short or long term?)
                      Asked on 12/15/2010 by Anonymous

                      2 answers

                      • CUSTOMER CARE

                        A:

                        This is recommended as a temporary fix because there is no guarantee this will fully resolve the problem.

                        Answered on 12/16/2010 by Ron the Auto Parts Rebel from AAP
                      • CUSTOMER CARE

                        A:

                        This is recommended as a temporary fix because there is no guarantee this will fully resolve the problem.

                        Answered on 12/16/2010 by Anonymous
                    • Q:

                      I have a 2002 chevy blazer with an intake gasket leak. It leaves a puddle on the ground about 10 inches in round. Would the liquid copper bars leak be the best additive to try to stop this leak, or should I use another one?
                      Asked on 12/11/2010 by jim from scotia ny

                      1 answer

                      • CUSTOMER CARE

                        A:

                        It may work, but there is really no guarantee with any of the additives.

                        Answered on 12/13/2010 by Mike the Auto Parts Master from AAP
                    • Q:

                      will this work on stainless steel
                      Asked on 10/26/2010 by bill from brookville,pa

                      1 answer

                      • CUSTOMER CARE

                        A:

                        It may but there is no guarantee.

                        Answered on 10/27/2010 by Mike the Auto Parts Master from AAP
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