Wire Glue on thinkgeek.com

[Al Skierkiewicz]

So that no one goes out thinking that this stuff would work well on a robot...
It is intended for small electrical jobs when solder is not convenient and the circuit does not pass a lot of current. Please do not try to use it to butt two #6 conductors together to extend the battery for instance. Please also be advised that the carbon in the glue (as described) is not a great conductor. It has some resistance. If you want to use it as shown to glue wire to an LED, I would not be able to stop you. You do need to insulate the connection though. And don't forget, this is not going to be a repairable connection. Make sure your polarized components are installed correctly before letting the glue dry.