Yeah, I've messed with it enough to be aware of that limitation.

Dyneema's a different critter, slippery as all heck but reacts to heat a lot like nylon and polypropylene.


(Google's reply to my query)

I've formed 'stoppers' on some stuff I've done with it with a torch & concave mould; it takes some unusual efforts to get knots that'll work.

All the typical cable heads I've ever handled looked to be cast-in-place, not unlike soldered, usually what looked like a zinc or aluminum alloy material.