I bought a second-hand pendant lamp that needed a little restoration before it could be installed in the kitchen. Among other things, I glued together the socket and fixture in one place with Casco Express Glue (there might also be some remnants of regular contact glue there).

When I was happily testing the lamp just now, a streak of white smoke came from the fixture where I had glued. I'm pretty sure the electricity is in order, but I'm suspicious of the glue.

Does anyone know if express glue or contact glue doesn't withstand high (halogen) temperatures?
 
Cyanoacrylate glue does not like high temperatures. Over 100 degrees is not recommended. The glue also reacts with some materials. For example, cotton smokes and can even start to burn upon contact.

I would probably check the electrical components in the lamp one more time just to be safe...
 
Sounds familiar when you say it, "temperature between -30 to +100 degrees Celsius". How hot can it get from a 40W G9 halogen (http://www.kjell.com/?item=63833)?
 
According to Google, the inside of the glass needs to be at least 250C for the lamp to regenerate, but below 400C to prevent the glass from melting. So somewhere between 250-400 degrees ;)

However, significantly higher for more powerful lamps. Apparently over 1000C.
 
It sounds a bit risky, but after the lamp sat unused for a few hours, there's no more smoke coming from it. Maybe the glue has fully cured (or completely evaporated :eek:)?

I'll be keeping a close eye on this...
 
I have the impression that cyanoacrylate glue loses strength and becomes brittle at high temperatures. There is likely a risk that the bond can break if exposed to high temp.
 
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