Glass Epoxy (G11)

 In Thermoset Plastics

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G11 Glass Epoxy Characteristics

G11 grade glass epoxy laminate offers improved mechanical strength at higher temperatures than G10.

Because epoxy resins such as G11 laminate are virtually impervious to moisture, this material is a good choice of thermosets for fabricated components used in electrical and mechanical applications.

Glass cloth materials have outstanding mechanical and electric strength as well as good dielectric properties.

G11 offers:

  • Good dimensional stability
  • Outstanding insulating and electrical properties
  • Moisture resistance
  • Excellent flammability rating
  • UL listed

Applications for G11 Thermosets

  • Power generation components
  • High temperature applications
  • High humidity applications
  • Structural parts
  • Printed circuit boards & terminal boards

Contact a Dielectric Manufacturing knowledge expert to discuss the use of G11 for fabrication of your parts. Call 800-367-9122 or email

Tensile Strength40,000 psi lengthwise35,000 psi crosswise
Comprehensive Strength60,000 psi flatwise35,000 psi edgewise
Flexural Strength - .125"55,000 psi lengthwise45,000 psi crosswise
Modulus of Elasticity - Flexural2,800 psi lengthwise2,300 psi crosswise
IZOD Impact7.0 ft-lb/in of notch lengthwise5.5 ft-lb/in of notch crosswise
Rockwell Hardness M scale112
Specific Gravity1.80
Bond Strength, in lbs.1,600
Coefficient of Thermal Expansion cm/cm- ºCx10-50.9
Water Absorption0.62" thick % per 24 hrs = 0.250.125" thick % per 24 hrs = 0.150.500" thick % per 24 hrs = 0.10
Dielectric Strength, volt/mil perpendicular to laminations: Step by Step 0.62" thick = 4500.125" thick = 350
Dissipation Factor, condition A, 1 megacycle max0.025
Dielectric Constant condition A, 1 megacycle max5.2
Insulation Resistance, Megaohms at Condition C200,000
Temp. Index 0.62" and overElectrical - ºC = 170Mechanical - ºC = 180
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