Choosing an epoxy?

[Laser Ben]

I am looking for an epoxy to glue metal to metal and metal to glass for attaching optic mounts inside a laser. I know the laser had some blue epoxy, does anyone know what this might be? I need something that will not out-gas and will not change shape once hard. It needs to dry quickly (<24 Hours).

Anyone here have an ideal what I might need? Thanks!

[buffo]

Don't know what epoxy that blue stuff might have been, but I've had great luck using JB Quick. It sets in 5 minutes and cures in less than an hour. No outgassing, and it will bond metal, glass, wood, and most plastics. I've used it to secure optics in their mounts (dichros, mirrors, and even a PBS cube), and I've also used it to secure sheet metal pieces and wood-to-metal joints. Great stuff.

Adam

[dave]

I am looking for an epoxy to glue metal to metal and metal to glass for attaching optic mounts inside a laser. I know the laser had some blue epoxy, does anyone know what this might be? I need something that will not out-gas and will not change shape once hard. It needs to dry quickly (<24 Hours).

Anyone here have an ideal what I might need? Thanks!

The thermal epoxy that RS-components sell is a blue color... But yeah as Adam said the 5 minute epoxy should be sweet..

[dream beamz]

Not really clean to work with (test it on non-important items first)

But extremely strong. I have used it to fix a hole in a motor and glassware and both repairs still hold to this day

[Laser Ben]

I was looking at he JB stuff, however it all appears to be too thick. I need something that is a liquid, not really thin, but not putty either. Perhaps some kind of UV cure stuff?

[dream beamz]

i would get a tube of quick steel, you can get it at walmart or advance auto parts for less than $5. it works thin or thick, i really do use it for anything. even repairs in wet conditions. I swear by it way over JB weld.

[mixedgas]

The zero outgas glass to metal stuff is Henkel hysol c4 white. Downside, takes a long time to cure. Upside, 10-7 vapor pressure and ceramic filled. Bonds glass and metal very well, like the glass or metal breaks first, that well. Fastenol sells it.

Most UV cure has no shear mode strength, so be careful what you wish for.

Besides, it takes a lot of UV to initiate a cure, like massive halogen or xenon arc lamp. No idea if a 402 nm diode is short wave enough to initiate, I doubt it. Usually 350 nm and down for initiators.

I think what I'm trying to say is call up Henkel and ask them for a 5 minute reccomendation similar to c4 white.

Steve

[Laser Ben]

Yeah, that sounds like the stuff I am looking for. I noticed when removing some old optics from mounts that the glass would break off before the glue broke! I found that a little heating to like 50-100C would weaken the glue.

Do you have a link to the stuff you are thinking of? I can't seem to find it on their site.

[Mr.Coffee]

Spill some beer on it and then let it dry, that shit holds like a VISE.

but if you don't want to go the professional route, I third the quicksteel route.
even normal expoy for that matter, I use it everywhere. if you want it a bit thinner you can dilute the mixed epoxy with rubbing alcohol (which also slows it down, so use the 1 minute stuff).

Not sure about the offgassing, though.

[DMills]

Torr Seal might be another viable option.

Regards, Dan.