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

4.2/5
Product ID: 31857662
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Details

  • Brand
    J-B Weld
  • Specific Uses For Product
    ['Repair'
  • Material
    Metal Aluminum
  • Compatible Material
    Alloy Steel
  • Item Form
    Paste
🔥1000°F / 537°C
♻️No solvents or VOCs
🛠️Permanent bond stronger than steel

Description

🔥 Weld Your Worries Away with J-B Weld! 🔥

  • EASY TO WORK WITH - Once cured, it can be drilled, machined, or sanded for a seamless finish.
  • NON FLAMMABLE FORMULA - Safe to use with no solvents or volatile organic compounds, ensuring a clean application.
  • VERSATILE APPLICATIONS - Ideal for exhaust systems, grills, and more—repair anything metal with confidence.
  • EXTREME HEAT RESISTANCE - Withstands temperatures up to 1000°F / 537°C, perfect for high-stress repairs.
  • ORIGINAL COLD WELD TECHNOLOGY - Developed as a reliable alternative to traditional welding methods.

J-B Weld 37901 ExtremeHeat is a high-performance metallic paste designed for repairs in extreme temperature environments, capable of bonding iron, steel, and metal at temperatures up to 1000°F / 537°C. This non-flammable, solvent-free formula offers a permanent bond stronger than steel, making it ideal for a variety of applications including exhaust systems and outdoor grills.

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Have a Question? See What Others Asked

Can I use this to repair a stove burner grate? I dropped it and the pieces need to glued together. Thanks
Is this waterproof?
Can this be used to"glue 2 pieces of metal together?
Can i use this on an engine block steipped bolt hole?

Reviews

4.2

All from verified purchases

H**N

Works as described!

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!

E**O

Works

Got this to fix a exhaust leak and to my surprise it works good but I’d say buy 2 and lay it on extra thick just in case seals great super easy to use I had mine right up near the engine so heat did nothing to it but make it stronger

L**

Good

Little hard to use at first but it works and does its job

B**P

really worked well on high heat repair

this stuff works!!had a small hole in the exhaust header of my truck. about the size of a dime. I opened the package, stirred it around a bit (settled during shipment, etc.) applied it direct to the header and that was about 3 weeks ago. Still holding strong. The exhaust headers on the motor probably get up to the 700'ish degrees F at the least. So high heat, good bond, works as advertised! Also, i did sand the area to bare metal before applying, I'd recommend this just to be sure to get a good bond.

L**N

as advertised

so far it is holding, will see when it actually gets hot.

T**N

waste of money, time, and effort

I prepared all surfaces with a Dremel with and wire brush attachment. All surfaces became shiny, clean metal.First impression of the product - very small. It says 3 ounces, but that's by weight, so obviously much smaller than 3 fluid ounces. That said, it also weighed less than 3 ounces on a tested scale even with the tub included, so I feel like I've been cheated.Next point: it was a thick, dense paste, not the liquid you see on the videos. I would guess that was because the foil was damaged or not properly sealed. It was the correct color: separate tan/black before mixing and cement gray after, but mixing took quite a lot of effort, because it felt like nearly cured cement when mixing.I did each step quickly, with no time between opening, mixing, and applying, so as not to allow it to cure prematurely. Being a nearly-dry cement consistency, It didn't want to adhere at all when applying it to the clean metal. I forced it to stay on by placing wood objects to keep it in place.I waited around around 30 hours. My setup to keep things in place worked. The epoxy became completely dry, but not strong at all. The very light metal parts separated with almost no effort beyond the parts' own weight. I was attaching a very light heat shield to a vehicle floor. The heat shield had two good bolts already holding one side and middle; I was just attaching the other side where the stud had broken from the vehicle floor. The bond didn't even last long enough to give the vehicle a test drive. The epoxy was just barely stronger than a dried sand castle. Strong enough to hold its shape, but noting else. I can crumble it with my fingers despite it having been given time to dry completely.In closing, this job took a lot of time and effort, and it was quite frustrating and discouraging to see the results. I will attempt to return this to the seller. Regular JB Weld has been good stuff, but this extreme heat version turned out to be a total failure.

S**K

Didn't work on my cracked engine block.

So i got a car with a cracked engine block, it was leaking coolant. I thought i give high heat a try, even though the coolant doesn't get that hot. Anyways, the problem with this stuff is it ONLY cures when under heat! I let it cure for 16 hours, and it came right off of the block. So i tried again and let it sit for about 36 hours, plus some time with a heat gun on it. That didn't work either!I ended up using normal JB weld and let it dry overnight. That worked.

S**R

Easy to use

Easy to use and works well

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

J B Weld 37901 Extremeheat High Temperature Resistant Metallic Paste | Desertcart Spain