Profile: Asheville Mica Company is a ceramic insulator supplier of mica and ceramic high temperature electrical insulation parts. We offer capabilities to provide fabricated parts from non-mica insulation. Natural mica washers have excellent dielectric strength, and are resistant to high voltage without puncturing. Typical specifications are greater than 1,000 volts per millimeter of thickness. Mica provides a high factor of safety with uniform dielectric constant, low power loss, high electrical resistivity and low-temperature coefficient.