WC-14 Fiberglass Mat is a porous, non-woven mat composed of lime borosilicate glass fibers.  The fibers are reinforced with chopped strand fiberglass yarn and bound with an acrylic binder.  The unique random, jackstraw pattern of the glass strands makes WC-14 fiberglass mat strong yet flexible and provides resistance to the cracking and crazing of the underlying substrate.  The mat increases resistance to impacts and abrasion and is rigid enough to bridge cracks and holes when adhered with #2500 coating.