ISOWOOL Bulk Fiber is produced by melting and fusing high-purity alumina/silica raw materials in an advanced electric arc furnace. The resulting fibers are exceptionally clean and are processed to achieve consistent quality and texture. ISOWOOL Bulk Fiber is highly refractory, loose, long, and flexible. It is manufactured in two different forms: Blown and Spun. Bulk Fiber is used as the primary raw material in the production of moldable materials and vacuum-formed panels and shapes.