Stable, virtually inert except to hydroflouric and concentrated sulfuric acid. Impervious to water and atmosphere. Unaffected by exposure to UV light, water or extended low and high temperatures. Free of asbestos and other non-asbestos fibrous materials. It is non-flammable, non-toxic and non-hazardous. Mica is invaluable in the electrical and electronics industries because of its unique combination of physical, chemical and thermal properties, low power loss factor, dielectric constant and dielectric strength. Mica flake is used in low fire clay bodies to add a sparkle effect.