Premium fiberglass mat. This .75oz Fiberglass Chopped Strand Mat is marine grade and suitable for boat building and repairs, roofing, custom speaker boxes, pond lining and many other applications. The mat is made of high-quality E-glass strands. It can be used with epoxy, polyester, surfboard or vinyl ester resins. This chopped strand mat has good wet out characteristics. It is quick to wet through and has high absorption. It can be torn, avoiding the need for cutting, and is ideal for laminating. This Fiberglass Chopped Strand Mat is rolled. The strands have a random alignment, giving the fabric an even strength with little or no stretch. Molds made from this fiberglass mat will be equally stiff in all directions. Be sure to work in a well-ventilated area and wear appropriate protective clothing, gloves and mask.