Solderable 2UEW/3UEW Super Thin Magnet Wire Enameled Copper Wire

Self-supporting coils are wound with wire coated with at least two layers, the outermost being a thermoplastic that bonds the turns together when heated.

Other types of insulation such as fiberglass yarn with varnish, aramid paper, kraft paper, mica, and polyester film are also widely used across the world for various applications like transformers and reactors.

In the audio industry, wires made from silver instead of copper are sometimes used. Various other insulators such as cotton (sometimes permeated with some kind of coagulating agent/thickener, such as beeswax) and polytetrafluoroethylene (Teflon) can be found. Older insulation materials include cotton, paper, or silk, but these are only useful for low-temperature applications up to 105°C.