Prepreg 7781 E-Glass

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  • Item
  • Description
  • Price
  • Qty
  • 2100
  • 2100
    50" Wide - Cut to length by yard

    Quantity Discounts

    Cut To Length

    (by yard)

  • $52.95
  • min. 10
  • 2100-A
  • 2100-A
    1 yd Roll
  • $72.95
  • 2100-B
  • 2100-B
    3 yd Roll
  • $189.95
  • 2100-C
  • 2100-C
    5 yd Roll
  • $279.95


New & Improved with Better Cosmetics

This fiberglass fabric features our 7781 E-Glass, part #543, pre-impregnated with a high strength epoxy resin system formulated for maximum flow and minimum surface porosity. This near-perfect resin content maximizes the properties of the fiberglass fabric, often chosen for aerospace and structural applications, and makes the way for repeatable, uniform parts.

Satin weave fiber glass fabrics are frequently specified for aerospace and structural applications, and offer excellent strength and surfacing characteristics.


  • Designed to be stored, shipped, and handled at room temperature—no refrigeration necessary
  • Best-in-class prepreg fiber glass material provides outstanding strength to weight ratio
  • Prepreg means less mess and waste; solvent and MDS-free
  • Three recommended cure cycles, requiring at most 310°F
  • Resin content 30%, +/- 3%
  • 50" width is ideal for most layups


  • Ideal for making high-strength parts that don't need to withstand high temperatures (up to 300°F)
  • Three recommended ramp-up cure cycles, requiring at most 310°F
  • 6 month shelf life at 75° does not require refrigeration
  • Woven fabrics are strong reinforcements because the fibers are bundled into yarns oriented in just two directions. The warp and fill yarns run at 0 and 90 degrees respectively. Thus, fabrics are anisotropic, or strong in only two directions.


Style 7781
Weight 8.7 - 9.0 oz/ sq yd
Tensile Modulus 420-460 KSI
Weave 8 HS
Yarn EDCE 75 1/0
Thickness 0.0089"
Color Translucent White


Fibre Glast is committed to ensuring that every roll of fabric we handle is First Quality and manufactured to the highest standards, so that you can expect the same properties and handling characteristics every time you order.

Click here for more information on our First Quality Guarantee.


Rolled fabrics ship in a long (45", 53", or 62") box. Click below on the "What to expect when you order Fabric" video to see how rolled fabrics are cut and shipped each time you order.


Prepreg 7781 E-Glass This fabric is sold by the linear yard, either as a prepackaged quantity or by continuous yardage. Prepacks This fabric is available in pre-cut lengths that measure one yard (#3110-A, roll), three yards (#3110-B, roll), and five yards (#3110-C, roll). Each is packaged and sold separately. For your convenience, these "prepacks" can be purchased in any combination. However, if the length for any one fabric totals 10 yards or more, we suggest you purchase it in continuous, "cut to length" yardage. Continuous, "Cut to Length" Yardage If you know in advance that you intend to purchase 10 yards or more of any one fabric, it should be ordered in continuous, "cut to length" yardage. In this case, fabric will be cut once according to the total yardage ordered, and customers receive a price-per-yard discount as compared to prepacks. Quantity discounts continue to deepen as the yardage increases for any one cut of one fabric.

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