Non-woven E-glass 12oz Biaxial Fabric (layer of 6oz at +45 degres stitched to another layer of 6oz at -45 degrees) and all stitched to a lightweight binderless 0.75oz Chopped Strand Mat. Total weight of fabric is 19oz per square yard. Biaxial fabric consists of non-crimped fibers which provide higher glass to resin ratio, less print thru and up to 20% more stiffness than woven fabrics. The biaxial construction provides strength while the chopped strand mat layer insures good bond strength to existing substrate. Desired when speed in lay up is required. Lay with mat side down. Will work with polyester, vinylester and epoxy resins as the mat does not have a binder. Used in marine construction and repair.