Dyneema is extremely strong, and resistant to abrasion, and very low stretch. This is the same stuff Zing It throwline is made from. It has a melting point considerably lower than polyester or nylon, however. (291F?) I have not used this particular cord. I'd be interested to hear what you think of it.
I am not particularly cord-savvy. I use Beeline on my lanyard but that is about the extent of my experience, and I am not yet a splicer. I had not looked into the temperature characteristics. That is a good idea.