The Expanded Vermiculite Insulation Brick is manufactured for the ever increasing and high heating demands in the industries of today and tomorrow. It has impressive thermal and fireproofing properties enhanced by an expansion nondeductible for its silver vermiculite. This insulation block is great not only for furnaces due to its lightweight, sound insulation probably providing outstanding. The insulation brick has Controlled pore structure which improves heat retention. It is effective in many industries that seek boiling reliability.