This is a very simple trick which you can use if you run out of solder or you find some other use for it. For this, you can iether use graphite shavings or any other form of conductive metal shavings.
1. Get some metal shavings.
2. Mix the epoxy for a couple seconds.
3. Put a nice, thick amount of metal shavings on the epoxy. (Use enough to make it conductive.)
4. Continue to mix for a little longer then what the instructions say.
5. Use epoxy on any metal joints that need to be conductive.