10 Yards of JPS Composite Materials 85392 S-Glass (S2) Fiberglass Fabric 6oz weight 38" width. We always ship our orders in rolls! Never buy your fiberglass fabric from sellers who fold their fabric. They are damaging the fabric before you even use it. S Glass fiberglass fabric is known to be the best type of fiberglass fabric for surfboard construction. Whether your just building your own board, or your a company that requires bulk, we want to help you get the best deal on our fabric we can. Please let us know what your needs are and how we can help. This is very high quality fabric made in the USA by JPS Please see photo for Material Data Sheet. Fiberglass 6oz S Glass 38" Plain Weave JPS Style 85392. S-glass creates about a 25-30% increase in breaking strength from the E-glass. Used in applications where the highest possible strength is required while keeping weight to a minimum. This material was made by JPS, a leading manufacturer of composite materials in the USA, and their long lasting presence in the composite industry will ensure you receive a quality material. S-Glass is commonly used in surf boards, fishing rods, boats, aircraft, and really any situation where high strength is needed. FROM THE MANUFACTURER Composition and Characteristics of S-Glass S-glass is a high performance glass fiber, distinguished from E-glass primarily by its higher silica content. S-glass typically contains the oxides of silicon, aluminum, and magnesium with the following mechanical properties: Density: 2.53 g/cm3 (157.9 lb/ft3) Tensile strength: 4,600 MPa (670 ksi) Modulus of elasticity: 89 GPa (12,910 ksi) Percent elongation: 5.2 Compared to E-glass, S-fiberglass offers much higher tensile strength and elastic modulus as well as about 10% greater stiffness. Other key characteristics include excellent temperature resistance, good moisture resistance, and long fatigue and shelf lives. These qualities make it suitable for use in demanding applications