WC-14 Fiberglass Mat is a porous, non-woven mat composed of glass fibers reinforced with chopped strand fiberglass yarn. The mat increases resistance to impacts and abrasion, and is rigid enough to bridge cracks and holes when adhered with No. 2500 Coating. When wet during application the WC-14 maintains its dimensional stability. Size: 48" x 40' roll Covers 160 square feet.