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 Details  
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 34 reviews)

Ratings Distribution

  • 5 Stars

     

    (18)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (5)

78%

of respondents would recommend this to a friend.

Pros

  • Easy to use (24)
  • Reliable (14)
  • Compact (7)
  • Can withstand use (6)

Cons

    Best Uses

    • Home garage (19)
    • Roadside repairs (14)
    • Automotive repair shop (5)
    • Upkeep (3)
      • Reviewer Profile:
      • Casual driver (6), Auto enthusiast (3)
      • Reviewer Profile:
      • Casual driver (11), Mechanic (9), Auto enthusiast (8), Truck enthusiast (6)

    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

     

    Does not work

    this product did not work however the cheaper leak stop by Bars Leaks does seem to work at least partially.

    this product did not work however the cheaper leak stop by Bars Leaks does seem to work at least partially.

    Reviewed by 34 customers

    Sort by

    Displaying reviews 1-10

    Back to top

    Previous | Next »

     
    5.0

    I can't believe that worked...

    By Mechanic Mike

    from Malta, NY

    About Me Casual Driver, Mechanic, Truck Enthusiast

    Level 1

    Pros

    • Can Withstand Use
    • Compact Design
    • Easy To Use
    • Reliable

    Cons

      Best Uses

      • Home Garage

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

      My 1997 Ram 2500 V8 sprung a leak out of nowhere coming from somewhere behind the alternator. A big one. So, i took a shot with this stop leak first and im glad i did. Within 1 minute, the leak slowed. In 3, it slowed to a slow drip. In 5, there was 1 drip every 30 seconds. After a trip around the block, no leak whatsoever. This was a miracle, it worked in -5 degree weather when i couldn't work on it! Great product. Would use it again and again and again.

      Comment on this review(earn points)

       
      1.0

      Clogs more than just leaks

      By Ben

      from Blacksburg, VA

      About Me Casual Driver

      Pros

      • Easy To Use

      Cons

        Best Uses

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

          I had a radiator leak and needed a quick fix while the radiator was being delivered. Dumped this goop into my radiator and the leak stopped long enough to get a new radiator. Later on, I found that my coolant reservoir was not draining into the radiator when it should. I took the hose out and found the clog. It was about five inches long and orange.

          Be careful with this stuff, it's works for a real emergency, but can cause unwanted clogs down the road.

          Comment on this review(earn points)

           
          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)

              (1 of 1 customers found this review helpful)

               
              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)

                      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.

                      39 Questions | 44 Answers
                      Displaying questions 1-10Previous | Next »
                      • Q:

                        I have a small antifreeze leak at the intake manifold gasket and planning to use this product for my 1999 GMC Safary. Could it block the heater core or the radiator?
                        My mechanic said that the heater core is very small and could get clogged and I read online that it may clog the radiator. Is there any way to flush this product out if that happens?
                        My green antifreeze doesn't look too dirty, should I change and flush the antifreeze before using this product anyway before?
                        Is there a better product to use for a smaller leak at the intake manifold gasket, this is supposed to be used for larger leaks?
                        Asked on 1/30/2015 by Tommy from Farmingdale, NY

                        1 answer

                        • CUSTOMER CARE

                          A:

                          I'm happy to help, Tommy! This Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (Part No. 1109) is intended to seal larger leaks and it is the only product that is specifically intended for intake manifolds. It's possible that this product could clog a heater core is not clean internally. If either your radiator or your heater core were to become clogged, you may be able to have them flushed to clear the contaminants.

                          With most leaks, it's best to repair the leak with a new gasket. Fel-Pro Intake Manifold Gasket Set (Part No. MS 98002 T) includes both the upper and lower intake manifold gaskets for your 1999 GMC Safari 4.3L V6.

                          If your coolant is due for a change, I suggest draining and refilling the system during this replacement. The typical coolant service for your vehicle is 15,000 miles or 5 years, whichever comes first. The suggested coolant for your vehicle is Dex-Cool (Advance Auto Parts Part No. A131). If you prefer to use the green ethylene glycol type coolant, Peak Conventional Green Antifreeze/Coolant (Part No. PKA0G3/12016) will replace your coolant.

                          If you would like to replace the gaskets yourself, I suggest purchasing a repair manual for your vehicle (Haynes Part No. 24010).

                          Answered on 1/30/2015 by Heath, ASE Parts Specialist from AAP
                      • Q:

                        Will this product work on a 2004 Saab93 ? The water pump was replaced being told that was the problem but still have a small- medium size leak. Thanks
                        Asked on 1/20/2015 by Pam from Pennsylvania

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Pam! These Bars Leak - Part No. 1109 will helps to fix a small leak in your water pump.

                          Answered on 1/21/2015 by Solomon
                      • Q:

                        How long does this bars leak liquid copper last?
                        Asked on 1/13/2015 by robinhood from corbin ky

                        2 answers

                        • CUSTOMER CARE

                          A:

                          Hello Robinhood, happy to answer that question for you. There honestly is no true time frame on how long the liquid copper lasts. It is more of a temporary fix and should be treated that way.

                          Answered on 1/15/2015 by Panda from AAP
                        • CUSTOMER CARE

                          A:

                          Hello Robinhood, happy to answer that question for you. There honestly is no true time frame on how long the liquid copper lasts. It is more of a temporary fix and should be treated that way.

                          Answered on 1/15/2015 by Panda from AAP
                      • Q:

                        2004 Tahoe Z71, this product can be put into the reservoir tank correct?
                        Asked on 1/4/2015 by t

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi T, glad to assist you! For best results Liquid Copper should not be installed in a regular overflow reservoir 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 1/5/2015 by Steve from AAP
                      • Q:

                        Will this product damage my water pump?
                        Asked on 12/27/2014 by John from Chesapeake,VA

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi John, this product will not damage your water pump.

                          Answered on 12/30/2014 by Steve from AAP
                      • 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
                      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.