The Insulating Fire Brick (IFB) withstands high temperature and is a great insulator. The IFB insulating refractory bricks are rated for high temperature uses. The light weight fire brick application is broad, mainly as insulator in industrial and hobby kilns, forges, furnaces heated by electric spiral elements or gas burners for hot face lining or outer heat insulation. The Insulating Fire Brick (IFB) is a type of soft brick made of refractory ceramic material, a blend of alumina and silica, that can withstand extremely high temperature applications and has a low thermal conductivity. This IFB is an excellent insulator and reflects heat well. Insulating Refractory Fire Bricks are light in weight and can be easily cut by handheld hack saw or any other hand tool like chisel or drill. They are ideal for creating custom shapes and cavities.