In article ,
says...

Wire such as Essex Soderon is solderable, as you want. The insulation melts
at approx. 237°C, well below 400°C.
Amazon, for one, has it at
https://www.amazon.com/Magnet-Enamel.../dp/B01EMHDXIM

Cheers,
Dave M





Unless they make more than one type of wire labled like that, it takes
about 390 deg C to melt the insulation from a youtube vidio. That is
what I bought off ebay and it does es not melt and solder evenwith my
iron set to over 350 deg C. The same company does make some wire that
is advertised at a much higher temperature rating also. I bought 3
different sizw wire spools from them and none of them would melt the
insulation at anything near the normal soldering temperatute. I even
tried it at a much higher temperature with my hot air rework wand.

Years ago a company (think it was Hamtronics) had some kits that coils
were wound and the wire was soldered to the terminals without manually
stripping.