J-B Weld High Heat Epoxy Syringe, Dark Grey

Super product very durable, quick drying time, good bonding, very effective and heat resistant. Used it to repair my outdoor stainless steel gas grill hood.

Wow. Just wow. I used this stuff to glue a handle back on to my fireplace door after replacing the glass panel that had shattered. The handle only has two small posts that connect it to the metal door frame, and I was uncertain whether there was enough surface area for the glue to hold. After applying the glue to the handle I let it set up for 24 hours, and MIRACLE - it is holding strong and tight! This stuff works. A great product that solved a difficult problem, I am very happy that I bought this.

Man this thing works my brother alternator had problems cracked on engine where you mounted it and had trouble tightening belts I ain’t gone lie I ain’t think it would work we put it on to the metal to hold the screw let it sit one day work perfectly never had problems so yea miracle worker and with the heat resistant help since it dealing with the engine best quality

Worked well for my application. Needed a solution to cover up oem exhaust baffles for a 2021 Chevy Trailboss. This was easy to mix and apply with a small boars bristle brush. Went on at the right consistency and seems to be holding up well.

I used this J-B Weld High Heat Epoxy Syringe to patch a small hole in the brick surround of my wood fireplace, and it got the job done well enough. The syringe design is handy—two-part epoxy (resin and hardener) mixes right as you push it out, so no messy stirring. I had a pea-sized hole from a chipped brick, and the dark grey color blended decently with the soot-stained area, though it’s not an exact match to fresh brick. Application was simple: cleaned the spot, squeezed out a dab, smoothed it with a putty knife, and let it cure. It’s rated for 500°F continuous (600°F short-term), which fits my fireplace temps—usually around 400°F near the surround. After a week of daily fires, the patch is holding strong—no cracks or crumbling, and it feels rock-solid. The 0.7 oz size was plenty for my small fix, with some left over. It’s not perfect, though. The cure time took the full 24 hours to feel fully hard (set in about an hour), so patience is key. Also, it’s a bit thick to work with—great for filling, less so for super-fine cracks. Compared to a basic heat-resistant caulk I’ve tried, this epoxy feels tougher and more permanent, though it’s overkill for non-structural stuff. For high-heat repairs like fireplace patches, it’s a reliable pick. I’d give it 4 stars—works as promised, but the thickness and cure time temper the ‘wow’ factor. Good for small, durable fixes!

I adjusted the valve clearance on a Generac motor put it back together and had a oil leak from the valve cover took the cover off and one of the corners broke off of it.so i was going to replace it but you can’t get parts that i needed from Generac i used a few different products nothing worked then I ordered JB WELD HIGH HEAT GREAT PRODUCT saved me

This has worked beautifully on the ceramic plate on the front of my wood stove. It gets pretty darn hot and so far no sign of it failing. Try it!

Needed for a part replacement and it has done amazing. Always reliable JB weld I mean what can you say

Producto funcional. Cumple con sus especificaciones. Lo use para pegar una tuerca que fija la bobina a la tapa de punterías y pego muy bien entre metal y plastico.

Very good product, thank you. It is heat resistant, as stated. I used it to stick a knob back onto an airfryer and it has worked really well.

Dessertcart just playing around with the delivery date!

Nov: 2025 Does what it says. I am from India and probably this is the first review from Indian Standpoint. I broke my engine oil pit hitting a rocky bottom on the road, which made a dent in the sump. After researching much I found out this solution to fix break for temperatures outside normal epoxy range and to my wonders this works great. I sanded the surface as described, cleaned it with rubbing alcohol and pasted a mix of the solution. It looks rock solid and theres no leak as well. Update: July 2026: It shows no sign of wear or leaks. Perfectly aligned as fixed. Hats off to the makers for products like these almost helped my ₹50k

Muy buen pegamento