My little knob is now perfect thanks
It's only flammable if you hold it into a flame, so is the original trangia kettle knob and the wooden one I've stuck on. I've tested this silicone tape on my camping pot handles and it's fine, I've used it on them for years. The flames leap up of the meths stoves and don't do anything to it, it's a good insulator to stop your fingers getting singed.
Btw, it's flame retardant.