FiberLock® Head Gasket & Block Repair, 32 oz.
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K & W Chemical FiberLock® Head Gasket & Block Repair, 32 oz.

Part No. 401224-6 Warranty Details  
$35.99
Quantity  Add to Cart
Permanent pour 'n go head gasket & block repair compatible with all types of antifreeze. Repairs cooling system leaks w/3 unique technologies: military-strength fibers nanotechnology & Cool-X Conditioner-the ultimate solution for all coolant leaks. Treatm
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Container Material:Plastic
Container Size:32 oz
Liquid Type:Beige Fibrous Liquid

REVIEW SNAPSHOT®

by PowerReviews
K & W ChemicalFiberLock Head Gasket and Block Repair
 
3.7

(based on 9 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (3)

67%

of respondents would recommend this to a friend.

Pros

  • Easy to use (5)

Cons

No Cons

Best Uses

  • Automotive repair shop (3)
    • Reviewer Profile:
    • Casual driver (5)

Reviewed by 9 customers

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Displaying reviews 1-9

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5.0

This stuff works! Have a recomendation!

By 

from Bethlehem Pa.

Pros

  • Cheap
  • Easy To Use

Cons

    Best Uses

      Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

      94 S10 155k mil. Had head gasket leak into cooling system. Would over pressurize system and over heat! Est. for fix over 1k. Figured why not try this. Added to top hose and ran as required. stopped problem enough to drive without over heating but still ran hot. Each drive got better. After 4 20 mile drives, totally sealed. One problem was no heat! Took off hoses to Heater core and flushed both ways. Heat is at 150 deg. now! My recommendation would be to loop Heater hose until sealed.

      Comment on this review(earn points)

      (3 of 3 customers found this review helpful)

       
      5.0

      used on 2005 bmw 545i

      By 

      from Tinton Falls, NJ

      Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

      I realized why the tip on the bottle said to pour directly into coolant hose not into overfill tank. I poured some in and it seemed to clog. I put some in the coolant hose as stated. It took a while for it to go in but then it did. I put some water after. I put some water in the coolant tank. Seemed like I clogged up the upper return port. I waited a bit. Then eventually the water started to flow. The car was smoking as usual.

      I turned the car off after idling and pouring as stated. I turned the car back on and it seemed to have a tight solid start. Like the feeling when all the screws are tightened down more. I drove around on the highway a bit then came back. I noticed no more smoke around the engine. My car has 233 thousand miles. It says not only does it seal coolant leaks, which my car kept losing coolant which I had to refill every 3-5 days for the past 3 weeks, it also fixes the head gasket. That is very interesting. Maybe it sealed the head gasket even further for more power. I floored it on the highway and it seemed fast like when I first got it.

      It seems this not only is a cure for a coolant leak but a performance improver as well!!

      Comment on this review(earn points)

      (4 of 4 customers found this review helpful)

       
      1.0

      Avoid Avoid Avoid!!!!!!!!!!!!!!!!!!!

      By 

      from Columbus, Ohio

      Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

      Product does seal, I will give it that. The problem is that it sealed my radiator before the product ever got to the engine! Now this could be due to the fact that a radiator on a Honda Civic has very small ports, but then again, the product claims it can be used in any automobile. It has a very thick consistency, even when shaken well. Maybe it could get to the engine on a bigger vehicle with a huge radiator, but I am not convinced. I would give zero stars if it was an option. I will follow up if the company actually honors the Double Money-Back guarantee or if I get the run around. Ended up having to buy a new car!

      Comment on this review(earn points)

      (5 of 7 customers found this review helpful)

       
      5.0

      K&W FIBERLOCK IS THE BEST...IT WORKS!!

      By 

      from ELLINGTON, CONNECTICUT

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

      Pros

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

      Cons

      • None

      Best Uses

      • Automotive Repair Shop
      • Coolant - Combustion
      • Home Garage
      • Upkeep

      Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

      I DON'T LIKE WASTING MY TIME AT ALL SO HEED MY RAVE ABOUT THIS MEGA-AWESOME PRODUCT! EVERYONE HAS TO KNOW ABOUT THE HEAD GASKET LEAK I HAD IN MY CHEVY S10 PICKUP 2.2L (NOTORIOUS FOR LEAKY HEADS) EXPERIENCE & K&W FIBERLOCK TAKING CARE OF IT!! IF YOU DON'T WANT TO BE DISAPPOINTED W/ NEGATIVE RESULTS TRY THIS PRODUCT! OK! IT'S ALMOST WINTER HERE IN CONNECTICUT & FEELING THE PRESSURE OF HAVING TO GO OUTSIDE POP OPEN THE HOOD & KEEP ADDING FLUID TO THE RADIATOR ON THE COLDEST DAYS OF THE YEAR HAD ME ALL SUPER PO'D! SO ON THE MORNING OF 09/17/14 I WENT TO ADVANCE AUTO IN STAFFORD SPRINGS, CT W/ AN ATTITUDE THAT COULD CHOKE A HORSE! A CASHIER NAMED CHRIS M. ASKED ME PLESANTLY "HOW'S YOUR MORNING?" I STARTED GRUMBELING ABOUT MY TRUCK HAVING A HEAD-GASKET LEAK AMONGST OTHER THINGS AS I WALKED OVER TOWARDS THE SEALERS SECTION. HE (CHRIS) CAME OVER TO ME & STARTED TO TALK TO ME ABOUT PERSONAL EXPERIENCES HE & HIS BOSS WERE CONFRONTED WITH, PERTAINING TO LEAKY HEADS "MY BOSS PUT THIS STUFF INTO HIS BMW & HE HAD PUT IT INTO A 95 CHEVY 2.2L & IT DEFINATELY WORKED" WELL I HAVE A 94 2.2L & CONSIDERING IT WORKED FOR THEM I'D GIVE IT A TRY. HE THEN SAID IT WAS $36.(4X THE AMOUNT MORE THAN I HAD EXPECTED) BUT THE BOTTOM LINE IS "THIS STUFF ACTUALLY WORKS" TO MY AMAZEMENT! IT'S BEEN A WEEK NOW & HAVE NOT ADDED ANY COOLANT WHAT-SO-EVER! I GUESS YOUR ALSO ASKING WHY AM I USING CAPITAL LETTERS IT'S CAUSE OF MY EXCITEMENT THAT SOMEONE LIKE CRC (THE MAKERS OF THIS AWESOME PRODUCT) COULD COME WITH SUCH A PRODUCT! DO SOME ONLINE RESERCH ON YOUR OWN & CHECK OUT THE CONSTITUANTS THAT ARE IN THIS AMAZING PRODUCT! I COULD GO ON BUT I'LL LEAVE IT UP TO YOU TO DO YOUR HOMEWORK: WATERGLASS, COPPER, ALUMINUM & KEVLAR! I AM GUIDED BY A HIGHER POWER & IT HAS BROUGHT ME TO A MUCHLY NEEDED RESOLUTION! I AM ALSO LEAVING IT IN THE SYSTEM FOR "NO MORE PROBLEMS" INSURANCE!

      Comment on this review(earn points)

      (5 of 7 customers found this review helpful)

       
      5.0

      It Works

      By 

      from West Columbia, SC

      About Me Casual Driver

      Verified Buyer
      Helpful Reviewer

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Upkeep

        Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

        Very good product.

        Comment on this review(earn points)

        (4 of 6 customers found this review helpful)

         
        1.0

        DOUBLE YOUR MONEY BACK LIMITED TO $43.00

        By 

        from Port Saint John, FL

        About Me Casual Driver

        Pros

          Cons

            Best Uses

              Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

              I tried it and it does not work as claimed. Then when I went to get the double your money back rebate. It was limited to $43.00...well I paid $35.99 for it so you can do the math where that doesn't add up. Use at your own risk!! Your better with a less expensive product.

              Comment on this review(earn points)

              (9 of 11 customers found this review helpful)

               
              5.0

              So far so good

              By 

              from Missouri

              About Me Casual Driver

              Pros

              • Easy To Use

              Cons

                Best Uses

                • Automotive Repair Shop
                • Roadside Repairs

                Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

                Had a coolant leak that I couldn't find after removing and checking all hoses. Wasn't the heater core either. Had to be a gasket. Unlike other products I was looking at, this one didn't require me to flush the system...bet. No cap directly on the radiator so we had to loosen the hose and pour it in that way. Let the car idle for a 20 minutes then took it for a ride. No leaks so far. If nothing else this is a great quick temporary fix but I'm hoping it's permanent like the manufacturer boasts. If I could suggest anything it would be that they sell it in a small bottle too as I didn't even use half. Thanks!

                Comment on this review(earn points)

                (7 of 12 customers found this review helpful)

                 
                1.0

                clogged heater core,blew radiator hose

                By 

                from Collierville,TN

                About Me Casual Driver

                Verified Buyer
                Helpful Reviewer

                Pros

                  Cons

                    Best Uses

                      Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

                      clogged heater core,blew upper radiator hose after driving couple miles. Caused more damage to the cooling system. Car still overheats.

                      Comment on this review(earn points)

                      (17 of 26 customers found this review helpful)

                       
                      5.0

                      Definitely recommend this product.

                      By 

                      from Union, Ky

                      About Me Auto Enthusiast, Mechanic

                      Level 2

                      Pros

                      • Easy To Use
                      • Reliable

                      Cons

                        Best Uses

                        • Automotive Repair Shop
                        • Home Garage
                        • Roadside Repairs

                        Comments about K & W Chemical FiberLock Head Gasket and Block Repair:

                        This stuff in the green jug works great! Sealed the head gasket within 20 minutes.

                        Comment on this review(earn points)

                        Displaying reviews 1-9

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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.

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

                          how to I unclog radiator now. this product clogged the radiator and the thermostat had a hard rock clumps
                          Asked on 6/21/2015 by hommie from kendall park new jersey

                          2 answers

                          • CUSTOMER CARE

                            A:

                            Happy to help you with your question Hommie! It will honestly vary on how clogged the radiator is, we have an item that can help flush the radiator (Part No pkf0ae) but again how well it works will vary on how bad the clog is.

                            Answered on 6/22/2015 by Panda from AAP
                          • CUSTOMER CARE

                            A:

                            Hi Hommie, I'm glad to help you! This product would flush out with water. It may take a few passes with water to remove the product from the radiator. If you believe that the thermostat is clogged, then I would suggest removing the thermostat and rinsing it with water and then re-installing it.

                            Answered on 6/22/2015 by Solomon
                        • Q:

                          Do you pour this directly into coolant resevoir? I have a 2012 Fiat 500 Sport.
                          Asked on 4/25/2015 by Jennifer from United States

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Hi Jennifer, good question! You have to flush your radiator and entire cooling system before you pour the K & W Chemical FiberLock® Head Gasket & Block Repair - Part No. 401224-6 stuff in. Otherwise, this stuff may clog your system.

                            Answered on 4/25/2015 by Solomon
                        • Q:

                          I have a 1988 GMC 1 ton pickup truck with a 454 engine.It overheats and has back preasure in the overflow tank. My question is do you think this produce will work. Do i need more than 1 32oz container,
                          Asked on 4/9/2015 by baggie from Mohrsville Pa

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Happy to help you with your question Baggie! The ability for this product to work will vary on the severity of the broken head gasket and if it does work it is only a temporary fix. 1 32oz container is enough for 1 vehicle.

                            Answered on 4/11/2015 by Panda from AAP
                        • Q:

                          On my RAV4 the mechanic says the radiator leak is at the top of the radiator which is plastic. Will FiberLock work on plastic as well?
                          Asked on 12/15/2014 by DI

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Hi DI, I'm glad to assist you! This Fiberlock can work to repair plastic radiators.

                            Answered on 12/16/2014 by Solomon
                        • Q:

                          Can you use this if the car won't start?
                          Asked on 11/2/2014 by Lawrence from United States

                          2 answers

                          • CUSTOMER CARE

                            A:

                            Hi Lawrence, glad to help you! Permanent pour n go head gasket & block repair compatible with all types of antifreeze. Repairs cooling system leaks w/3 unique technologies: military-strength fibers nanotechnology & cool-x conditioner-the ultimate solution for all coolant leaks. It repairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and buses. 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 11/4/2014 by Steve from AAP
                          • CUSTOMER CARE

                            A:

                            Hi Lawrence, glad to help you! Permanent pour n go head gasket & block repair compatible with all types of antifreeze. Repairs cooling system leaks w/3 unique technologies: military-strength fibers nanotechnology & cool-x conditioner-the ultimate solution for all coolant leaks. It repairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and buses. 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 11/4/2014 by Steve from AAP
                        • Q:

                          I have a 1997 ford ranger 4.0 with a leak at one of the
                          soft plugs will this do it
                          Asked on 9/5/2014 by Anonymous from Syracuse NY

                          1 answer

                          • CUSTOMER CARE

                            A:

                            I'm happy to help! This K & W Chemical FiberLock Head Gasket and Block Repair (Part No. 401224-6) may stop the leak in the block at your expansion plug. You may also be able to repair the plug with a new expansion plug. Here is a link to a search for expansion plugs for your 1997 Ford Ranger 4.0L V6.

                            Answered on 9/8/2014 by Heath, ASE Parts Specialist from AAP
                        • Q:

                          I have a coolant leak in my Oldsmobile 1996 Cutlass Supreme. It looks like it is coming from the water pump. Will this product work in this situation?
                          Asked on 6/10/2014 by Drewbydoo

                          3 answers

                          • CUSTOMER CARE

                            A:

                            I'm happy to help, Drewbydoo! While it is possible this will fix the leak on your 1996 Oldsmobile Cutlass Supreme coming from your water pump. This product is compatible with all anti-freeze. A replacement water pump may provide a more permanent solution. There are a few water pumps available for your vehicle and some are less than this product. To find the correct water pump, make sure to enter the correct engine size for your vehicle.

                            Answered on 6/11/2014 by Heath, ASE Parts Specialist from AAP
                          • CUSTOMER CARE

                            A:

                            Hi Drewbydoo, glad to help you! This product repairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and buses. The nanotechnology reinforced with military-strength fibers for a superior permanent repair. It is compatible with all anti-freeze.

                            Answered on 6/11/2014 by Steve from AAP
                          • CUSTOMER CARE

                            A:

                            Hi Drewbydoo, glad to help you! This product repairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and buses. The nanotechnology reinforced with military-strength fibers for a superior permanent repair. It is compatible with all anti-freeze.

                            Answered on 6/11/2014 by Steve from AAP
                        • Q:

                          Is this ok to use with thermostat or do I need to take it out first, couldn't find answer on bottle of this product but other products said to remove so wasn't sure, also does it need to be flushed out after so long or do I keep it in until next routine radiator flush?
                          Asked on 6/4/2014 by jcobble

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Good question, Jcobble! It is not required to remove the thermostat. You can remove it if you like.

                            Answered on 6/5/2014 by Vincent from AAP
                        • Q:

                          Will this work on a compression leak to radiator only one way will not go back in head no leaks only pressure into radiator
                          Asked on 4/18/2014 by jeff from denver co

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Hi Jeff, glad to assist you! This part repairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and buses. Repairs cooling system leaks with 3 unique technologies: military-strength fibers nanotechnology & cool-x conditioner-the ultimate solution for all coolant leaks.

                            Answered on 4/19/2014 by Steve from AAP
                        • Q:

                          i bought one green bottle of fiberlock head gasket to fix my suparu 99 engine overheat , i did as my mechanic advise for using to repair the head gasket but unfortunately it didn't work , so i'm asking how can i refund my money back ( double money back guarantee)
                          Asked on 3/25/2014 by essay

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Hi Essay, happy to help! If you are not completely satisfied with your purchase, return it to any Advance Auto Parts store or to our returns center within 90 days from the date of your purchase. All refunds will be credited back to you via the same payment method used for your original order. Shipping and handling charges are not refundable except in the case of returns due to our error. For more information regarding the returns please visit this link. http://shop.advanceautoparts.com/o/returns

                            Answered on 3/26/2014 by Steve from AAP
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