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J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz

Description:

  • Jb Weld Extreme Heat: Is Formulated For Repairs To Iron, Steel And Metal In High Temperature Environments 1000°F / 537°C. Non-Flammable, It Contains No Solvents Or Volatile Organic Compounds (Vocs).
  • The Original Cold Weld: Jb Weld Was Developed As An Alternative To Torch Welding. Designed To Be Effective In Extreme Environments, Once It Sets, It Creates A Permanent Bond Stronger Than Steel.
  • Simple To Use: When Fully Cured, This Metallic Compound Can Be Drilled, Machined Or Sanded. It Is Great For Repairing Cracks, Small Gaps, Seam Connections Or Holes.
  • Versatile & Dependable: Ideal For Repair Work On : Exhaust Manifolds, Pipe Connections, Mufflers, Catalytic Converters, Outdoor Grills, Fire Boxes, Gas And Commercial Furnaces And Water Heaters.
  • Review:

    5.0 out of 5 stars This Stuff Is Great!

    L.D.Y. · July 11, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } This stuff is great! I patched to holes in a catalytic converter and despite the intense Heat, the product has remained intact! It's easy to mix and apply, and dries rather quickly.

    5.0 out of 5 stars Works as described!

    H.W. · May 31, 2025

    Used this to patch a crack in my muffler on my 150cc scooter and so far it has worked perfectly! I live in North Texas and it's June, so it's pretty warm out even in the evenings, so I had no problems with cure time. Started to harden within a few minutes after application.I did have to mix up the product pretty well before it was ready, but that was easy. It doesn't come with something to stir/apply it, so I used a small spatula that came with another weld glue product.Seems to be holding well even with high temperatures. If it fails I will update this review, but so far so good!

    4.0 out of 5 stars Wish it was a paste.

    G. · June 13, 2024

    I have used another one of their products that is intended for a similar use. That is more like toothpaste than a tube so it is somewhat easier to apply because you can put it on the tip of your finger and place it where need be. This comes in a extremely small jar. You have to stir it before using it so the only thing I could use was a small screwdriver. Trying to get it in on my manifold around all the obstructions It was so watery that it was difficult to not have it completely run off my finger before getting it to where I needed it to be. It's not completely liquid but it's not the paste either. Not really satisfied with how little of it you get compared to let's say the paste that the same manufacturer sells. One thing that I understand but I don't like is that you cannot apply heat to it for 24 hours. So with the amount of heat that would come off of a manifold obviously you really do have to wait It's not like an exhaust pipe that would be cooler. So the negatives were: amount given, size of container, product consistency. Waiting for it to cure so I cannot give a review on quality

    5.0 out of 5 stars Great product with long-term results, if you use it correctly!

    A.C.F.F.L. · July 7, 2022

    I purchased this item to repair an ash fettle in an old Vermont Castings wood burning stove, and it completely exceeded my expectations outlasting an entire season of direct fire contact. The fettle was cracked into two pieces and a prior owner had drilled two holes on either side and tried to connect it with an aluminum "bridge." The repair interfered with the door closing, so I needed to seamlessly "weld" the two cast iron sides back together. Before going through the trouble of taking it to a welder and paying to have it repaired properly, I took a chance on this J-B Weld ExtremeHeat.I used a Dremel tool with a fine grinding stone and cleaned up the two broken faces, along with about 1/4 inch of the area on either side of the crack. Following the advice of another review, I then took a cotter pin, stuck it into the chuck of my battery powered drill, and used that to thoroughly stir the J-B Weld in the container (this is a one-time use container... once opened and stirred, use it and toss the rest). After stirring for just under 2 minutes, I immediately applied it to the two surfaces, pieced them together, and then spread a little more on either side to ensure a supported bond. I then set the item on a flat piece of cardboard to cure for 2 days. (NOTE: you have to support the joint while curing, because the J-B Weld provides no structural support until completely cured. While wet, the item will just fall apart again if the pieces aren't otherwise held together.)When it was done, I replaced the fettle and lit the first fire of the season (crossing my fingers at the same time). Several months and probably 100+ fires later, the piece was still holding strong like the day I put it in. The fettle sits right against the fire, and many logs have rolled into it while it was extremely hot, with no noticeable damage whatsoever. I would absolutely recommend and use the J-B Weld ExtremeHeat again on future projects. As long as the proper preparation is done, and you follow the instructions, it's an awesome product!

    5.0 out of 5 stars It works on stovetop cast iron grates

    R.S. · July 4, 2025

    Follow the instructions and this works well.I has a gas stovetop grate crack and the replacement price was $150 — no way! It was for the middle grate that I rarely use, so it was worth trying this.My 1st attempt I didn’t sand the connecting pieces well enough, and the second time I let it dry in a position where weight was helping the bond for 24 hours. That clearly made the difference.

    It works.

    r.s. · November 4, 2021

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Amazing result. Used on an old gas oven door. Unable to get parts to repair handle but this product did the trick.Very pleased.

    Very good and handy product for repairing metal cracks..

    j. · January 20, 2024

    I bought it to fill the gap developed in high pressure vessel..it is very good and handy in such situations..highly recommend.

    Amazing

    S.A. · November 16, 2023

    This glued me and my wifes marriage back together

    buono

    R.M. · September 7, 2022

    ottimo direi!!!

    いい商品です。

    上. · March 6, 2025

    車のエキマニが割れてしまったため応急処置でこちらを使用し、排気漏れを止めていました。先日エキマニを交換する機会があったため、応急処置をした部分を確認しましたが全く割れはなく排気漏れの再燃もなくとてもいい商品だと確信しました。

    J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz

    Product ID: UO01VOBOL74
    Condition: New

    4.2

    BHD594

    Price includes VAT & Import Duties
    Size: 3 oz
    Style: Paste
    Availability: In Stock

    Quantity:

    |

    Order today to get by

    Free delivery on orders over BHD 20

    Return and refund policies

    Imported From: United States

    At bolo.bh, we stand behind the authenticity and quality of every product we sell. We guarantee that all items offered on our website are 100% genuine, sourced directly from authorized distributors, trusted partners, or the original brands themselves.

    We do not sell counterfeit, replica, or unauthorized goods. Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support . We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, including images, descriptions, and reviews, is provided by third-party vendors. bolo.bh is not responsible for any claims, promotions, or representations made within product content or images. For more accurate or detailed product information, please contact the manufacturer directly or reach out to Bolo Support.

    Unless otherwise stated during checkout, all prices displayed on the product page include applicable taxes and import duties.

    bolo.bh operates in accordance with the laws and regulations of Bahrain. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in Bahrain are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

    Similar suggestions by Bolo

    More from this brand

    Similar items from “Industrial Lubricants”

    J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz

    Product ID: UO01VOBOL74
    Condition: New

    4.2

    Size: 3 oz
    Style: Paste

    BHD594

    Price includes VAT & Import Duties
    Availability: In Stock

    Quantity:

    |

    Order today to get by

    Free delivery on orders over BHD 20

    Return and refund policies

    Imported From: United States

    At bolo.bh, we stand behind the authenticity and quality of every product we sell. We guarantee that all items offered on our website are 100% genuine, sourced directly from authorized distributors, trusted partners, or the original brands themselves.

    We do not sell counterfeit, replica, or unauthorized goods. Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support . We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, including images, descriptions, and reviews, is provided by third-party vendors. bolo.bh is not responsible for any claims, promotions, or representations made within product content or images. For more accurate or detailed product information, please contact the manufacturer directly or reach out to Bolo Support.

    Unless otherwise stated during checkout, all prices displayed on the product page include applicable taxes and import duties.

    bolo.bh operates in accordance with the laws and regulations of Bahrain. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in Bahrain are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

    Description:

  • Jb Weld Extreme Heat: Is Formulated For Repairs To Iron, Steel And Metal In High Temperature Environments 1000°F / 537°C. Non-Flammable, It Contains No Solvents Or Volatile Organic Compounds (Vocs).
  • The Original Cold Weld: Jb Weld Was Developed As An Alternative To Torch Welding. Designed To Be Effective In Extreme Environments, Once It Sets, It Creates A Permanent Bond Stronger Than Steel.
  • Simple To Use: When Fully Cured, This Metallic Compound Can Be Drilled, Machined Or Sanded. It Is Great For Repairing Cracks, Small Gaps, Seam Connections Or Holes.
  • Versatile & Dependable: Ideal For Repair Work On : Exhaust Manifolds, Pipe Connections, Mufflers, Catalytic Converters, Outdoor Grills, Fire Boxes, Gas And Commercial Furnaces And Water Heaters.
  • Review:

    5.0 out of 5 stars This Stuff Is Great!

    L.D.Y. · July 11, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } This stuff is great! I patched to holes in a catalytic converter and despite the intense Heat, the product has remained intact! It's easy to mix and apply, and dries rather quickly.

    5.0 out of 5 stars Works as described!

    H.W. · May 31, 2025

    Used this to patch a crack in my muffler on my 150cc scooter and so far it has worked perfectly! I live in North Texas and it's June, so it's pretty warm out even in the evenings, so I had no problems with cure time. Started to harden within a few minutes after application.I did have to mix up the product pretty well before it was ready, but that was easy. It doesn't come with something to stir/apply it, so I used a small spatula that came with another weld glue product.Seems to be holding well even with high temperatures. If it fails I will update this review, but so far so good!

    4.0 out of 5 stars Wish it was a paste.

    G. · June 13, 2024

    I have used another one of their products that is intended for a similar use. That is more like toothpaste than a tube so it is somewhat easier to apply because you can put it on the tip of your finger and place it where need be. This comes in a extremely small jar. You have to stir it before using it so the only thing I could use was a small screwdriver. Trying to get it in on my manifold around all the obstructions It was so watery that it was difficult to not have it completely run off my finger before getting it to where I needed it to be. It's not completely liquid but it's not the paste either. Not really satisfied with how little of it you get compared to let's say the paste that the same manufacturer sells. One thing that I understand but I don't like is that you cannot apply heat to it for 24 hours. So with the amount of heat that would come off of a manifold obviously you really do have to wait It's not like an exhaust pipe that would be cooler. So the negatives were: amount given, size of container, product consistency. Waiting for it to cure so I cannot give a review on quality

    5.0 out of 5 stars Great product with long-term results, if you use it correctly!

    A.C.F.F.L. · July 7, 2022

    I purchased this item to repair an ash fettle in an old Vermont Castings wood burning stove, and it completely exceeded my expectations outlasting an entire season of direct fire contact. The fettle was cracked into two pieces and a prior owner had drilled two holes on either side and tried to connect it with an aluminum "bridge." The repair interfered with the door closing, so I needed to seamlessly "weld" the two cast iron sides back together. Before going through the trouble of taking it to a welder and paying to have it repaired properly, I took a chance on this J-B Weld ExtremeHeat.I used a Dremel tool with a fine grinding stone and cleaned up the two broken faces, along with about 1/4 inch of the area on either side of the crack. Following the advice of another review, I then took a cotter pin, stuck it into the chuck of my battery powered drill, and used that to thoroughly stir the J-B Weld in the container (this is a one-time use container... once opened and stirred, use it and toss the rest). After stirring for just under 2 minutes, I immediately applied it to the two surfaces, pieced them together, and then spread a little more on either side to ensure a supported bond. I then set the item on a flat piece of cardboard to cure for 2 days. (NOTE: you have to support the joint while curing, because the J-B Weld provides no structural support until completely cured. While wet, the item will just fall apart again if the pieces aren't otherwise held together.)When it was done, I replaced the fettle and lit the first fire of the season (crossing my fingers at the same time). Several months and probably 100+ fires later, the piece was still holding strong like the day I put it in. The fettle sits right against the fire, and many logs have rolled into it while it was extremely hot, with no noticeable damage whatsoever. I would absolutely recommend and use the J-B Weld ExtremeHeat again on future projects. As long as the proper preparation is done, and you follow the instructions, it's an awesome product!

    5.0 out of 5 stars It works on stovetop cast iron grates

    R.S. · July 4, 2025

    Follow the instructions and this works well.I has a gas stovetop grate crack and the replacement price was $150 — no way! It was for the middle grate that I rarely use, so it was worth trying this.My 1st attempt I didn’t sand the connecting pieces well enough, and the second time I let it dry in a position where weight was helping the bond for 24 hours. That clearly made the difference.

    It works.

    r.s. · November 4, 2021

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Amazing result. Used on an old gas oven door. Unable to get parts to repair handle but this product did the trick.Very pleased.

    Very good and handy product for repairing metal cracks..

    j. · January 20, 2024

    I bought it to fill the gap developed in high pressure vessel..it is very good and handy in such situations..highly recommend.

    Amazing

    S.A. · November 16, 2023

    This glued me and my wifes marriage back together

    buono

    R.M. · September 7, 2022

    ottimo direi!!!

    いい商品です。

    上. · March 6, 2025

    車のエキマニが割れてしまったため応急処置でこちらを使用し、排気漏れを止めていました。先日エキマニを交換する機会があったため、応急処置をした部分を確認しましたが全く割れはなく排気漏れの再燃もなくとてもいい商品だと確信しました。

    Similar suggestions by Bolo

    More from this brand

    Similar items from “Industrial Lubricants”