I use aluminum bonsai wire because it works and is soft, and because I have a ton of it from back in my bonsai days. But I can say that Dr Martin Motes uses "liquid nails" which is for a caulk gun I believe. He uses it for mounts and for attaching Vandas to trees. Just put your leftover cartridge in the freezer for long term storage so it doesn't dry out (I would also bag it first to protect the food in your freezer).
By the way, he says that he has tried everything and has gotten the best results from liquid nails.