1800 Glastic Grade FHT

Note: This is a variation of Glastic SG-200 & FHT Sheet (SG-200 is a 410ºF Fiberglass Reinforced Polyester Sheet / FHT is a 392ºF Flexible High Temp. Laminate).

SG-200 and FHT are the highest temperature FRP composite materials. They offer similar properties as the lower temperature materials, and SG-200 has excellent machinability. SG-200 is the rigid version, and FHT is the flexible version.


Oxygen Index21.8 % Oxygen
IEC Track Resistance (CTI) ( V )500+
UL High Voltage Track Rate ( in/min )0
UL Recognition File NumberE81928
UL Subject 94HB
UL High Amp Ignition200+ #Exposure
Specific Gravity1.60
Water Absorption ( % )1.1
Tensile Strength ( psi )10500
Compressive Strength ( psi )14000
Arc Resistance ( sec )139
Standard ColorNatural/Cream
IZOD Impact Strength (Notched) ( ft lb/in )10.0
Permittivity, 60 Hz6.4
Dissipation Factor, 60 Hz0.070
UL Temperature Index for Electrical ( ºC )0.028 in./190
0.058 in./200
UL Temperature Index for Mechanical ( ºC )0.028 in./190
0.058 in./200
Electrical Strength - Perpendicular S/T in Air ( vpm )450
Electrical Strength - Parallel S/S in Oil ( kV )60
Permittivity, MHz4.2
Dissipation Factor, MHz0.033
UL Hot Wire Ignition ( sec )0.028 in./49
0.058 in./102
Electrical Strength - Perpendicular S/T in Oil ( vpm )570

Additional Information

  • Highly Flexible
  • Excellent Dielectric Strength
  • High Heat Resistance
  • Ideal For Dry-Type Transformers
  • Easily Fabricated
  • Asbestos-Free
Glastic® Grade FHT (Flexible High Temperature) Laminate provides numerous high-performance features and benefits, such as high flexibility and excellent dielectric strength at elevated temperatures. It also exhibits the highest UL temperature index in the industry for a flexible glass-reinforced polyester in 1/32 inch and 1/16 inch thicknesses:
  • 1/32 inch – 190ºC Electrical
  • 1/16 inch – 200ºC Electrical
  • 1/32 inch – 190ºC Mechanical
  • 1/16 inch – 200ºC Mechanical
With its high resistance to heat, Glastic’s FHT Laminate offers a cost-effective alternative to aramid paper in 220ºC insulation systems. Typical applications include layer and core insulation for dry-type transformers. Glastic Grade FHT Laminate standard color is tan.

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