Bluewind Vermiculite Light-weight Insulating Firebrick is specifically manufactured for industrial furnace use and best insulative efficiency. Such processes can include the compression of the brick followed by sintering at elevated temperatures which gives these bricks controlled pore structures which provide enhanced thermal performance. This firebrick serves not only as a transition refractory membrane, but also as backup insulation which retains heat. The result is industrial processes that work harder, for longer, using less energy.