High Heat Epoxy

[EZ G]

Anyone know of any Epoxy's that can handle high temp?

I have heard that some can, but reports are conflicting. Real world experience would be preferable to labels.

[triaged]

What do you consider "high temp"? What does the epoxy need to do?

A few of the big names are

https://www.devcon.com

https://www.henkel.com

https://www.3m.com

https://www.dow.com

Look up on their web site for product data sheets.

You could also just look on www.mcmaster.com because chances are if they don't carry something it will not be easy to find elsewhere.

[arfan66]

I've used some aerospace grade paste adhesives but even they have a limit (250-350 deg. F). They may also be load (shear, tension, torsion) sensitve and will fail at a lower temp when subjected that specific load. What exactly do you want to accomplish?

[otteray]

[krazy]

Epoxy Technologies

ND353, it actually uses high heat to cure. Goes from a clear to a opaque brown.

[TheBundo]

I've never had anything but disappointment with JB Weld

[dreamerof1]

Hysol EA 9394 is good to 177 C. It's tough and stable, too.

[dfletcher]

I've never had anything but disappointment with JB Weld

Same here - soft and wouldn't stay put.

[technocia]

I've never had anything but disappointment with JB Weld

It's cheap though, compared to those other expensive epoxies. Or is there anything just as cheap but better?

[arfan66]

Hysol EA 9394 is good to 177 C. It's tough and stable, too.

+1 for Hysol products!

It's cheap though, compared to those other expensive epoxies. Or is there anything just as cheap but better?

You get what you pay for. You mix & bond once or buy another part, mix & bond again knowing that you might have to do it yet again.....

[Vacaville]

I've never had anything but disappointment with JB Weld

I had a friend whose mother smashed his ceramic bong in high school, and he put all the pieces back together with JB Weld. We used it for about 10 years after that (not sure what was in the fumes after that though). Since then I have always been an advocate for JB Weld.

[drexotic]

[motorhead]

bear in mind the jb weld ak build failed after only a couple shots. only slightly more sucessful than the toothpick build.

[brolin1911a1]

I've never had anything but disappointment with JB Weld

Same here - soft and wouldn't stay put.

You were possibly not mixing completely. In my last job, I had to repair numerous printed circuit boards that had been hit by lightning and often had holes burned through them. I found that I could fill the holes with the slow-setting (not the 5-minute) J-B Weld compound, stick new traces over the compound while it was still tacky, and solder to them after the J-B Weld had finished curing. Trying that with ordinary two-part epoxies resulted in a mess since the epoxies would blacken and bubble at 300 degrees F or less and the solder melted at about 400 - 450F.

I had good luck with J-B Weld but one does have to be very conscientious about mixing it thoroughly and in the the correct ratio of hardener to resin. If it stayed soft for you, improper ratios or insufficient stirring would be my guesses.