Except for insulation material, fiberglass is a great material as well, for example there is GPO-3/UPGM203 fiberglass mat sheet. A fiberglass is a form of fiber-reinforced plastic where glass fiber is the reinforced plastic. This is the reason perhaps why fiberglass is also known as glass reinforced plastic or glass fiber reinforced plastic. The glass fiber is usually flattened into a sheet, randomly arranged or woven into a fabric. http://www.zbhaichencomposite.com/insulation-sheet/gpo-3-upgm203-fiberglass-mat-sheet/