Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.)
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Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.)

Part No. PLT11 Warranty  
Seal internal, external and coolant-to-oil leaks with Bar's Leaks Stop Leak Heavy-Duty Radiator Sealer. The pelletized formula works safely on plastic, aluminum and metal radiators. Product Features: Designed for use on plastic, aluminum and metal radiators, heater cores, blocks, heads, gaskets and freeze plugs, Compatible with conventional green (silicate-based) and red, orange or yellow (OAT) antifreeze, Patented Rhizex pellets dissolve quickly to seal internal, external and coolant-to-oil leaks, Lubricates water pump seals and prevents formation of rust and scale, Helps to prevent corrosion and control electrolysis, 1 bottle treats systems up to 4 gallons

Product Features:
  • Protects Engine Cooling Systems
  • Stops Current and Future Leaks
  • In hibits Rust & Corrosion
  • Lubricates Water Pump Seal
  • Helps Control Electrolysis
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Antifreeze Type Compatibility:Yes
Boiling Point at 50/50 Mixture:>480 deg F
Contains Corrosion Inhibitors:No
Contains Ethylene Glycol:No
Contains Lubricant:No
Contains Stop Leak:Yes
Manufacturer Warranty Compatibility:Yes
Non-Toxic:Yes
Radiator Material Compatibility:All
Recommended Change Interval:12000 mi

REVIEW SNAPSHOT®

by PowerReviews
Bars LeakStop Leak Heavy-Duty Radiator Sealer (11 fl. oz.)
 
2.9

(based on 12 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (5)

55%

of respondents would recommend this to a friend.

Pros

  • Easy to use (9)
  • Reliable (3)

Cons

    Best Uses

    • Home garage (5)
    • Upkeep (4)
    • Roadside repairs (3)
      • Reviewer Profile:
      • Casual driver (4), Auto enthusiast (3), Mechanic (3)

    Most Liked Positive Review

     

    Good Stuff

    Just follow the instructions folks. It's not a miracle worker but I once drove an Oldsmobile around for 5 years with cracked heads (not the gasket, the heads) and one bottle a year...Read complete review

    Just follow the instructions folks. It's not a miracle worker but I once drove an Oldsmobile around for 5 years with cracked heads (not the gasket, the heads) and one bottle a year helped me to wait till I could fix it right. Steamy windows due to weepy heater core - very likely to put an end to that problem. Small hole in your radiator or radiator end caps - very likely to put an end to that too. In fact, if the mandrel in your water pump is a little leaky or some freeze plugs have pin hole and you need some time, I would bet this will help. Just be sure to follow the instructions.

    VS

    Most Liked Negative Review

     

    bad stuff

    dont use it,it will stop up your radiator and cause over heating and you will have to get another radiator!!!!!

    dont use it,it will stop up your radiator and cause over heating and you will have to get another radiator!!!!!

    Reviewed by 12 customers

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    Displaying reviews 1-10

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    5.0

    worked great Cadillac north star

    By william

    from folkston ga

    About Me Casual Driver

    Pros

    • Easy To Use

    Cons

      Best Uses

      • Upkeep

      Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

      Need pellets for north star 4.6 used this product an it worked great to replace the gm pellets for cooling systen

      Comment on this review(earn points)

       
      5.0

      Bar's stop leak

      By donrm

      from Westchester,Ohio

      About Me Auto Enthusiast, Truck Enthusiast

      Verified Buyer

      Pros

      • Easy To Use
      • Reliable
      • Saved Me 200

      Cons

        Best Uses

        • Automotive Repair Shop
        • Home Garage
        • Roadside Repairs

        Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

        I have a Ford F600 Dump truck. The power steering belt came off & trashed the radiator, so I thought. I checked prices on a new radiator. Up and more than $200. I thught I would try the Bar,s stpo leak, had great reviews. I had a few squirters on my radiator. 1 bottle & NO LEAKS.Saved me more than $200 BUCKS!!!!!!

        Comment on this review(earn points)

         
        5.0

        Good Stuff

        By 2002 Cadillac Deville

        from Griffin, GA

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Easy To Use
        • Reliable

        Cons

          Best Uses

          • Roadside Repairs
          • Upkeep

          Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

          Just follow the instructions folks. It's not a miracle worker but I once drove an Oldsmobile around for 5 years with cracked heads (not the gasket, the heads) and one bottle a year helped me to wait till I could fix it right. Steamy windows due to weepy heater core - very likely to put an end to that problem. Small hole in your radiator or radiator end caps - very likely to put an end to that too. In fact, if the mandrel in your water pump is a little leaky or some freeze plugs have pin hole and you need some time, I would bet this will help. Just be sure to follow the instructions.

          Comment on this review(earn points)

          (1 of 2 customers found this review helpful)

           
          1.0

          Didn't Help, Might've Made Leak Worse

          By StevenCee

          from Atlanta, GA

          About Me Casual Driver

          Verified Buyer
          Level 2

          Pros

          • Easy To Use

          Cons

          • Didn't work
          • May Worsen The Leak

          Best Uses

            Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

            I used it as directed, and within a few days noticed my coolant leaking on the ground, when I parked. I could see it dripping down, and kept having to put more coolant into the car, to maintain proper levels. When I took it to a garage, they showed me a hariline crack on the top of the radiator. I discovered that my mechanic had mentioned it to me months ago, but I forgot he did, and since I only had to add fluid now & then, didn't think it was a pressing issue. That's when I tried the Stop Leak, thinking it might stop up my slow leak. Well, as I said, if anything, it made it much worse. Now I have to get a new radiator...

            Comment on this review(earn points)

             
            3.0

            Not a fix just for maintenance

            By RC

            from N PLF NJ

            About Me Mechanic

            Verified Buyer
            Level 2

            Pros

            • Easy To Use

            Cons

              Best Uses

              • Upkeep

              Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

              easy to use just didnt fix 2 little pinholes had to drain rad and remove to have pro fix

              Comment on this review(earn points)

               
              5.0

              I would buy again

              By ranger

              from manchester,n.j

              About Me Casual Driver, Mechanic, Truck Enthusiast

              Verified Buyer
              3 or more reviews submitted

              Pros

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

              Cons

                Best Uses

                • Home Garage
                • Upkeep

                Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

                Tryed other products,they did not work as well as this brand

                Comment on this review(earn points)

                (4 of 8 customers found this review helpful)

                 
                4.0

                Stops most leaks it seems

                By Backyard Junk Mechanic

                from Central Virginia

                About Me Auto Enthusiast

                Verified Buyer
                Helpful Reviewer

                Pros

                • Easy To Use

                Cons

                  Best Uses

                  • Home Garage

                  Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

                  First time I have used this product in years, and it still works. The pellets seem to melt and fill in any leaks in the radiator and heater coil. I had a leak in my heater coil and it has stopped, although the smell is still sometimes present when heat is cut on.
                  ***Don't know if it is related, but a heater hose bursted the day after I put this product in the vehicle's radiator, but it was an easy fix.***

                  Comment on this review(earn points)

                  (4 of 8 customers found this review helpful)

                   
                  1.0

                  Don't use this stuff

                  By BeN

                  from OKC, Oklahoma

                  About Me Casual Driver

                  Pros

                    Cons

                    • Difficult To Use

                    Best Uses

                      Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

                      Used this junk, and my car is still at the repair shop. Coolant can't circulate because this stuff has clogged the motor even with a new radiator. It will be cheaper to get a new radiator, than to buy this

                      Comment on this review(earn points)

                      (4 of 8 customers found this review helpful)

                       
                      1.0

                      Sludgy and Sandy

                      By blitz

                      from winterville, nc

                      About Me Auto Enthusiast, Competitive Driver, Mechanic

                      Pros

                        Cons

                          Best Uses

                          • Home Garage

                          Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

                          Well when i had my old radiator with a leak i used this and it did seal up the leaks when i first used it but then it leaked again few days later. And when I flushed system out and installed a new radiator month or so later, the overflow tank was turning black so i keep dumping the coolant from it and refilling it but it kept turning black. So I Opened radiator cap and there was like black sludge on top and it wsa sandy like someone pour some sand into radiator. I would never use this again instead I would just replace things and keep it maintained

                          Comment on this review(earn points)

                          (36 of 71 customers found this review helpful)

                           
                          1.0

                          Ironic Product

                          By Dave

                          from Southampton, MA

                          About Me Mechanic

                          Helpful Reviewer

                          Pros

                          • Easy To Use
                          • Stopped the original leak

                          Cons

                          • Cause waterpump to leak

                          Best Uses

                          • Emergency
                          • In small doses

                          Comments about Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.):

                          My GM V6 sprung a coolant leak in the timing cover gasket area. Typically one would use tablets from GM to fix minor leaks on these Iron/Aluminum motors. I chose to save a few dollars and use this product.Quite a sludgy product - though I was pleased shortly after using when my leak went away. Ironically, my waterpump's seal begin to leak heavily a few days later... So I saved on the bars - but the waterpump was $12 and a few hours time....For the record - the waterpump was not harmed by the original coolant leak - coolant level was "full" in the pressurized part of the system the entire time. However, the recovery tank would slowly go down - and I would top it off daily.

                          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.

                          6 Questions | 6 Answers
                          Displaying questions 1-6
                          • Q:

                            How far can I go with out it starting to leak again? Will it last for a 3- 3 1/2 drive?
                            Asked on 7/10/2013 by Missy from Milwaukee, Wi

                            1 answer

                            • CUSTOMER CARE

                              A:

                              The recommended change interval for the Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.) (Part No. PLT11) is 12000 miles. 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 7/11/2013 by Steve from AAP
                          • Q:

                            Will this product clog up and/or otherwise harm the cooling system and/or cause the engine and/or transmission to overheat?
                            Asked on 6/11/2013 by Hank from Jacksonville, Fl

                            1 answer

                            • CUSTOMER CARE

                              A:

                              No, this Bars Leak Stop Leak Heavy-Duty Radiator Sealer (11 fl. oz.) -part# PLT11 will not harm the cooling system and cause the engine and transmission to overheat as it is to protect the Engine Cooling Systems. 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 6/11/2013 by Vincent from AAP
                          • Q:

                            can i use this on a jimmy? it takes dexcool coolant
                            Asked on 8/30/2011 by sweetzz from Mi

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Yes, you should be able to use this in your Jimmy.

                              Answered on 8/30/2011 by Steve from AAP
                          • Q:

                            I have a 48 Willis Jeep that the radiator is leaking along a seam were it is sealed togeather. It may be a copper radiator. Will this work
                            Asked on 8/25/2011 by Anonymous

                            1 answer

                            • CUSTOMER CARE

                              A:

                              It will work only on plastic, aluminum and metal radiators.

                              Answered on 8/25/2011 by DIY Daniel from AAP
                          • Q:

                            will it work on a plastic radiator
                            Asked on 7/6/2011 by Lynnbird from North Little,,AR

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Yes, this should work fine on a plastic radiator.

                              Answered on 7/7/2011 by Vincent from AAP
                          • Q:

                            can this perminately stop a leak?
                            Asked on 2/3/2011 by rick from new enterprise pa

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Yes, this Bars Leak Stop sealer stops leak permanently.

                              Answered on 5/11/2011 by Just Ask Jacob! from AAP
                          Displaying questions 1-6

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