High Zirconia Alkali Resistant Glass Fiber ZrO2>14.5%, ZrO2>16.5% 2400tex ... GRC. It is the base material used to make glass reinforced cement (GRC). Light, high in strength, incombustible ... industry as boards, corrugated proofing sheets, division panels, internal and external insulation panels, decorative panels, dust panels, ... artistic sculptures. also available. Alkali Resistant Glass Fiber Roving