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 Details  
$9.99
Quantity  Add to Cart
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. 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
Contains Corrosion Inhibitors:No
Contains Ethylene Glycol:No
Contains Lubricant:No
Contains Stop Leak:Yes
Lubricant Type:None
Manufacturer Warranty Compatibility:Yes
Radiator Material Compatibility:All
Recommended Change Interval:12000 mi
Boiling Point at 50/50 Mixture:104 Deg. F
Non-Toxic:Yes

REVIEW SNAPSHOT®

by PowerReviews
Bars LeakLiquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.)
 
3.7

(based on 36 reviews)

Ratings Distribution

  • 5 Stars

     

    (18)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (3)

  • 1 Stars

     

    (7)

74%

of respondents would recommend this to a friend.

Pros

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

Cons

No 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 36 customers

Displaying reviews 1-10

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(8 of 12 customers found this review helpful)

 
5.0

I can't believe that worked...

By 

from Malta, NY

About Me Casual Driver, Mechanic, Truck Enthusiast

Helpful Reviewer

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.

    (5 of 11 customers found this review helpful)

     
    5.0

    Stopped leak totally

    By 

    from Auburn, IN

    About Me Casual Driver

    See all my reviews

    Ask me a question

    Verified Buyer
    3 or more reviews submitted

    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.

      (6 of 10 customers found this review helpful)

       
      5.0

      saved the day

      By 

      from ny ny

      About Me Auto Enthusiast, Mechanic

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      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

        (8 of 12 customers found this review helpful)

         
        5.0

        IT WORKS!

        By 

        from Danville, PA

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

        Helpful Reviewer

        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!

          (8 of 15 customers found this review helpful)

           
          5.0

          Works as advertised

          By 

          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.

          (9 of 18 customers found this review helpful)

           
          5.0

          Works Great!!!!

          By 

          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.

          (10 of 19 customers found this review helpful)

           
          5.0

          Great product

          By 

          from Rocky Mount, VA

          About Me Auto Enthusiast, Truck Enthusiast

          See all my reviews

          3 or more reviews submitted

          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.

            (10 of 14 customers found this review helpful)

             
            5.0

            Works on Ford timing cover leak

            By 

            from Richmond, Virginia

            See all my reviews

            Ask me a question

            Verified Buyer
            Helpful Reviewer

            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.

            (43 of 98 customers found this review helpful)

             
            5.0

            Wonderful product ,will buy agian

            By 

            from ohio

            About Me Auto Enthusiast, Casual Driver

            See all my reviews

            Ask me a question

            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 .

            (72 of 140 customers found this review helpful)

             
            5.0

            Awesome product

            By 

            from Miami, FL

            About Me Casual Driver

            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.):

              I use this product to seal an engine block leak in a 2002 Ford windstar. I monitored the coolant level in the reservoir until it was just about empty. I then poured the "Block Seal..." into the reservoir and run the engine until all was sucked into radiator/motor. I then fill the reservoir with coolant. NO MORE LEAK.
              Simply AWESOME!

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              Do you have questions about this product?

               

              Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

              50 Questions | 55 Answers
              Displaying questions 1-10Previous | Next »
              • Q:

                I have a 2004 Buick Randezvous with a small radiator leak. I removed the radiator cap but it started draining the reserve tank. Can I put the Bar s liquid copper in the reserve tank and will it worki
                Asked on 5/25/2017 by kpoole from Portland, Me.

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Kpoole! This Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) should work fine on your 2004 Buick Randezvous which has the power to stop those leaks quickly, effectively and affordably. It will permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. Use 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 1⁄2 (half) of bottle. For other small systems use approximately 3 ounces per gallon of cooling capacity. In larger systems, use 1 (one) bottle for every 6 gallons of cooling system capacity. For technical sheet, please copy and paste this link.
                  URL:https://barsleaks.com/wp-content/uploads/2014/11/1109-Tech-Sheet.pdf

                  Answered on 5/26/2017 by Solomon from AAP
              • Q:

                Can i add more then one bottle at a time
                Asked on 11/21/2016 by todd from herkimer ny

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Todd, glad to assist you! Dosage: Use – 1/2 (half) bottle in a small cooling system, such as 4 cylinders with no A/C. For other small systems use approximately 3 ounces per gallon of cooling capacity. Use 1 bottle for regular size systems, which are most 4, 6, 8 and 10 cylinder engines. In larger systems, use 1 bottle for every 6 gallons of cooling system capacity. For more information, please copy and paste this technical data sheet link. URL - http://barsleaks.com/wp-content/uploads/2014/11/1109-Tech-Sheet.pdf

                  Answered on 11/22/2016 by Steve from AAP
              • Q:

                Will it turn black in the radiator and look like dirty oil?
                Asked on 9/26/2016 by Bernard the newbie

                1 answer

                • CUSTOMER CARE

                  A:

                  No, Bernard, this Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) will not make your oil darker in the radiator. Note: Cooling systems that are dirty or partially clogged should be flushed before usage. Protect bottle from freezing. For more information, please copy and paste this technical data sheet link. URL - http://barsleaks.com/wp-content/uploads/2014/11/1109-Tech-Sheet.pdf

                  Answered on 9/28/2016 by Steve from AAP
              • Q:

                Would you use this to stop leakage from rear end seals?
                Asked on 7/16/2016 by phi from clinton ma

                1 answer

              • Q:

                Would you use this to stop leakage from rear end seals?
                Asked on 7/16/2016 by phi from clinton ma

                1 answer

              • Q:

                About a year ago my heat stopped blowing hot. Not a big deal as I live in Florida. I have always had a very tiny drip after driving in one freeze plug. Now my radiator has a small leak that I can't see exactly where it's coming from. It's a 99 dodge durango 5.2L 4x4 that before me was severely abused. So much work has been done to it and I am out of cash for a radiator. It get's hot after about 20-30 minutes of driving. Will this product be ok for this 223K mile engine? And will this be simple enough to do as I am an older female?
                Asked on 5/22/2016 by Jackie from central florida

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Jackie, glad to assist you! This Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) should work fine for your application. This product permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. Use 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 1⁄2 (half) of bottle. For other small systems use approximately 3 ounces per gallon of cooling capacity. In larger systems, use 1 (one) bottle for every 6 gallons of cooling system capacity.

                  Answered on 5/24/2016 by Steve from AAP
              • Q:

                will this seal a small leak from a lower radiator hose ?
                Asked on 12/14/2015 by jack

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Jack, I'm glad to assist you. This Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) should work fine for your application. This product permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs.

                  Answered on 12/14/2015 by Solomon from AAP
              • Q:

                I have a 2004 Chevy Venture. It is overheating and I know there is a leak around the coolant bypass tube. I have replaced the o-ring and it continues to leak. I believe I also have an intake gasket leak. However, as this is my primary mode of transportation I will not be able to get to replacing the gasket for a week or so. Is the purpose of this product to stop/slow these types of leaks? Also, once I get around to replacing the gasket, will this product create a hard to clean mess in the engine around those leaking areas?
                Asked on 11/2/2015 by James the Novice Mechanica from Clover, SC

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi James, happy to help you! The Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. However I would always recommend fixing the problem by finding out exactly the cause of leak and then replacing the necessary parts.

                  Answered on 11/3/2015 by Steve from AAP
              • Q:

                I have a 2004 Toyota Sienna that uses the non-diluted extended life Toyota coolant. I have small leaks around a few of the radiator fittings (not hose leaks). Is this product compatible and would this be a good application?
                Asked on 10/28/2015 by Don from Virginia

                1 answer

                • CUSTOMER CARE

                  A:

                  Hi Don, this Bars Leak Liquid Copper Block Seal Intake and Radiator Stop Leak (18 oz.) (Part No. 1109) permanently seals larger leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs. However I would always recommend fixing the problem by finding out exactly the cause of leak and then replacing the necessary parts.

                  Answered on 10/29/2015 by Solomon
              • Q:

                My Kia Carnival is experiencing missing coolant and it seemed that the fuild somehow reached to the engine block and mixed with the engine oil. Can this product help? How do I use this product? Detail instructions would be helpful.
                Asked on 10/13/2015 by Cain from Malaysia

                1 answer

                • CUSTOMER CARE

                  A:

                  Sorry, Cain. Without the presence of your vehicle we would not be able to properly diagnose it, nor provide you with a 100% answer. I would suggest that you take your vehicle and get it thoroughly checked by a certified mechanic before buying any parts that may/may not solve the problem.

                  Answered on 10/13/2015 by Solomon
              Displaying questions 1-10Previous | Next »

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