Heat shrink tube; how much heat can brake wire casing take?
I’m looking to clean up the final wiring on my recent road bike build, and I’d like to use heat shrink tubing to combine the brake wire casing and Di2 cable between the steerer and the entry point at the head tube.
How much heat can really an ordinary Shimano brake wire casing take – not to mention the Di2 cable?
I’ve seen it done, I’m just looking for qualified views on if the casing or the cable might take damage from the heat necessary to start the shrinking process.
I’ll be using a heat gun for the purpose.