J-B Weld High Heat Epoxy Syringe, Dark Grey

This is perfect for oven glass doors ! Easy to use. It is quick drying and works as advertised ! Comes with everything you need to mix and apply it! It is a great product . And you can put the cap on it and reuse it for other projects .

I'm really impressed with the J-B Weld High Heat Epoxy Syringe. Fixing cracks can be a hassle, especially when you need something to hold up to high heat. This epoxy syringe made the whole process so much easier. The One-Step Syringe is a Game Changer - Forget messy mixing and imprecise measuring! The one-step syringe design is genius. Just dispense equal parts of the epoxy from the dual plungers and you're good to go. No mess, no fuss, and no chance of messing up the ratio.The epoxy sets up in about an hour at room temperature, and cures completely in 24 hours. That's plenty fast for most repairs. But the real winner here is the heat resistance. I used it to fix a crack in my chiminea, and it's held up perfectly through the first few fires.I'll definitely update this review after I've used the chiminea for a longer period, but so far, I'm very happy with the J-B Weld High Heat Epoxy Syringe. It's easy to use, bonds like crazy, and can take the heat. Highly recommend!

Used many things to seal a seam in a muffler. Nothing worked until now. This stuff was great. Wire brushed the seam to clean all old rust, Reinforced with some tin foil. Have been holding for over a month and passed inspection!!!

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!

Works great. I highly recommend.

Easy to use. Since fixing the handle, I've been using the pan at 500 degrees F and the handle stays solid. My minor wish is if they sold a smaller quantity at a lower price.

Really good for small, permanent repairs. Follow the instructions, and let it dry completely. I experimented with a little bit before I used it. When it dried, it was stronger than the part I repaired.

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