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3.7 oz. S-Glass Plain Weave Fiberglass Fabric Style 4522



3.7 oz. S-Glass Plain Weave Fiberglass Fabric Style 4522 provides high strength/stiffness. Ideal for weight-critical applications.

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The 3.7 oz. S-Glass Fiberglass fabric is a plain weave fabric woven with high strength S-2 fiberglass fibers. The S-glass fibers are approximately 30% stronger and stiffer than E-Glass and offers better properties at elevated temperature. This fabric is ideal for use in applications where strength and weight factors are critical.

It has been sized with an epoxy and polyester compatible finish to enhance wet-out and is suitable for use in wet layup, vacuum bagging and resin infusion manufacturing.


Physical Properties

  • Style: 4522
  • Weave: Plain Weave
  • Weight: 3.66 oz/yd²
  • Thickness: .005″
  • Fabric Count (Warp x Fill): 24 x 22
  • Warp Fiber: S-Glass
  • Fill Fiber: S-Glass
  • Warp Fiber Strength: 197 lbf/in
  • Fill Fiber Strength: 157 lbf/in

Technical Fiber Properties

  • Fiber: S-Glass
  • Density: .090 lb/in³
  • Tensile Strength: 665 ksi
  • Tensile Modulus: 12.5 msi
  • Strain to Failure: 5.5%
  • Specific Tensile Strength: 7.42 106 in
  • Specific Tensile Modulus: 1.40 108 in
  • Coefficient of Thermal Expansion: 0.90 10-6/°F
  • Decomposition Temperature: 1562°F

Please note: All data to be used as a guide only; not a specification.


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  • Epoxy Resin
  • Polyester Resin
  • Vinyl-ester Resin


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