Vermiculite is a mineraloid of hydrated laminar magnesium-aluminum-ironsilicate, heat insulation, fireproof, sound insulation, moisture absorbing, insecticide tolerance, weather ability, high tension stress, lightweight, fine electrical insulation, smoke free and toxic free under high temperatures, fire resistant core for fire doors heat preservation and sound insulation boards for walls, fire resistant walls and ceilings, heat insulation boards in planes, trains, cars, ships, ovens and pipes, fire brick in stove, electric heater, storage heater, furnace and fireplace.