I bought some of this stuff (or similar):-
It's carbon loaded glue, the stuff I bought claimed to have carbon nanotubes in it. I wanted it to make vias in PCBs.
I used to make a lot of doublesided PCBs at home. More recently I started buying manufactured ones because I was having to make the vias with wire soldered in from side to side, which is OK for some circuits, but it cuts down the packing density you can achieve and you have to bring connections onto leaded components from the solder side.
As I said, I bought the conductive glue to wipe into the vias in the hope that it would make a decent connection, but I got nowhere with it. Maybe my technique was at fault though.
I wondered if anybody had any success with it in any application?