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.)
 
3.9

(based on 32 reviews)

Ratings Distribution

  • 5 Stars

     

    (17)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (4)

80%

of respondents would recommend this to a friend.

Pros

  • Easy to use (22)
  • Reliable (13)
  • Compact (6)
  • Can withstand use (5)

Cons

    Best Uses

    • Home garage (18)
    • Roadside repairs (14)
    • Automotive repair shop (5)
    • Upkeep (3)
      • Reviewer Profile:
      • Casual driver (6), Auto enthusiast (3)
      • Reviewer Profile:
      • Casual driver (9), Auto enthusiast (8), Mechanic (8), Truck enthusiast (5)

    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 32 customers

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    Displaying reviews 1-10

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    5.0

    Stopped leak totally

    By MLB153

    from Auburn, IN

    About Me Casual Driver

    Ask me a question

    Verified Buyer
    Level 3

    Pros

    • Easy To Use
    • Reliable

    Cons

      Best Uses

      • Home Garage

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

      1997 Park Ave. had developed a leak in one of the gaskets and was leaking coolant. Poured product in radiator and drove for 825 miles. It didn't immediately stop the leak, but by 825 miles after putting in coolant, the leak was totally stopped. I believe it really helped that I drove the car at operating temperature for 50 miles each time I ran the car. I think that made the product really work properly with a very hot coolant to adhere to the leaking gasket area. It saved me lots of money and also no down time with the car. This is just great stuff to just add to your coolant for the "just in case" leak as what happened in my case.

      Comment on this review(earn points)

      (1 of 1 customers found this review helpful)

       
      5.0

      saved the day

      By steve

      from ny ny

      About Me Auto Enthusiast, Mechanic

      Verified Buyer
      Level 3

      Pros

      • Compact Design
      • Easy To Use
      • Reliable

      Cons

        Best Uses

        • Home Garage
        • Roadside Repairs

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

        Helped keep me going

        Comment on this review(earn points)

         
        3.0

        dont know yet

        By SCOOTER

        from KNOX.,TN

        About Me Auto Enthusiast, Casual Driver, Mechanic, Truck Enthusiast

        Verified Buyer
        Level 1

        Pros

        • Easy To Use

        Cons

          Best Uses

          • Home Garage
          • Roadside Repairs
          • Upkeep

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

          Seems to have sealed intake leak. Stopped steam coming from exhaust. Will know for sure after i perform tune up.(still misses)

          Comment on this review(earn points)

          (2 of 2 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)

            (1 of 2 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)

            (2 of 2 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)

            (8 of 12 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)

              (5 of 8 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)

                      Displaying reviews 1-10

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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.

                      34 Questions | 38 Answers
                      Displaying questions 1-10Previous | Next »
                      • Q:

                        can this product be put in the plastic reservoir?
                        Asked on 11/8/2014 by lorf from chicago

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Lorf, glad to assist you! Yes, this product will work fine on your plastic reservoir.

                          Answered on 11/9/2014 by Solomon
                      • Q:

                        I went to put this in my radiator, but it was full. I only got about a quarter inch of a bottle in the radiator
                        Asked on 10/12/2014 by Kyle from DE

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Kyle, glad to assist you! Add 1 (one) bottle for regular size cooling systems, this covers most 4, 6, 8 and 10 cylinder engines. For small cooling systems, such as 4 cylinders with no air conditioning, use ½ (half) of bottle. For larger systems, use 1 (one) bottle for every 6 gallons of cooling system capacity.

                          Answered on 10/13/2014 by Steve from AAP
                      • Q:

                        I have a 2008 Infiniti G35 and I have a leak in my radiator. I have to pour coolant in m radiator about twice a week. Will this help fix my leak and keep the coolant in my radiator?
                        Asked on 7/17/2014 by Erika

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Glad to assist, Erika! This will work fine with your application. It contains an antifreeze compatible sodium silicate liquid glass formula, so no draining of the cooling system is required. It will not harm the cooling system when used properly. Use with all types of 50-50 mix antifreeze including conventional green or blue (Silicate-based) and extended life red/orange or yellow (OAT /HOAT) coolant.

                          Answered on 7/19/2014 by Vincent from AAP
                      • Q:

                        Will this work in a 2004 Volvo S60? If so, where do we pour it? The bottle says to pour it directly into the radiator, however, we see no way to access the radiator. Should we pour it into the coolant reservoir?
                        Asked on 7/9/2014 by Stacey from Newport News, VA

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Stacey, glad to assist you! This part should work fine on your 2004 Volvo S60. For best results Liquid Copper 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.

                          Answered on 7/11/2014 by Steve from AAP
                      • Q:

                        Can this product be used to fix a leak on a car roof?
                        Asked on 6/22/2014 by John Smith from United States

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi John Smith, glad to assist you! This product permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. For 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 6/23/2014 by Steve from AAP
                      • Q:

                        so only one of my fans on my mazda mx-6 works and my heater doesnt, will this product still work for my car? is it a neccessity to have the heater and fans on?
                        Asked on 5/28/2014 by Dyliano

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Dyliano, glad to assist you! 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 thoroughly checked by a certified mechanic.

                          Answered on 5/29/2014 by Steve from AAP
                      • 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
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