Question for you guys. I bought the stuff to make extra coils (10 gauge solid copper wire) and the heat sleeve for the wire.

The heat sleeve is not required but it is nice to have. It provides a barrier to the actual piece of metal you are heating so that there isn't direct metal on metal contact.

My question is what I can use to secure the ends of the sleeve material to keep it from slipping around or unraveling? I think shrink tube will work really good but the problem is I need (I think) something to withstand more heat. I don't know for sure but regular shrink tubing could possibly melt.

I don't know exactly how hot the coil gets, but I know it's too hot to touch, hence the reason to have more than one coil per brass size.

I've seen some shrink tubing that has heat ratings on it but it wasn't very high. Simply put I don't know what my options are.