Called FastSteel

<a href="http://www.polymericsystems.com/PDF_Files/FastSteelTDS4019-0302.pdf">This *.pdf</a> says it's rated at 250ºF continuous.

<img src="http://pictureposter.audiworld.com/58837/faststeel.jpg" />

but it seems to hold fine if surface preparation is very good. Just be sure to wire brush, or sand and wipe with acetone or laquer thinner any/all surfaces you're adhering it to. And keep your fingers damp while mixing or it builds up on your fingers.