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Thermally pretreated (tempered) Glass Fabric

Glass Fabric heat-treated (tempered)

Glass Fabric heat-treated (tempered)

Heat-treated or tempered glass fabric is made from standard woven glass fibers and undergoes an additional finishing phase in which the fabric is passed through a high-temperature oven. This process burns off the small amounts of weaving oils and lubricants (size) present on standard glass fiber yarns. It can also help remove surface fibers, which may reduce irritation during handling.

This process results in the light brown or "caramel-colored" appearance of the fabric. Caramelized glass fabric is often specified when no fumes or "outgassing" can occur during the initial heat cycle of the end product or in applications where weaving oils and lubricants might affect adhesion to other products.

MaterialGlass fabric, made from smooth (GF) or textured (GT) yarns
Manufacturing widths1000 - 2000 mm
TreatmentHeat Treated / Caramelised (thermally desized) (T)
Heat-treated, thermally desized glass fabrics – Our Trusted Standard Grades

For information on additional grades or our customized coating options, feel free to contact us.

Quality type Structure Temperature resistance
(permanent | short-term)
Weave Standard Width Data Sheet
GF200P.RG.T E-glass fabric (200 g/m²)
heat-treated and caramelized
550 °C | 600 °C Leinwand / Plain 1000 - 2000 mm
GF430.RG.T E-glass fabric (430 g/m²)
heat-treated and caramelized
550 °C | 600 °C Atlas / Satin 1000 - 2000 mm
GT580.RG.T E-glass fabric (580 g/m²)
heat-treated and caramelized
550 °C | 600 °C Leinwand / Plain 1000 - 2000 mm
GT950K.RG.T E-glass fabric (950 g/m²)
heat-treated and caramelized
550 °C | 600 °C Köper / Twill 1000 - 2000 mm

Technical Characteristics

  • Temperature resistance up to 550 °C, short term up to 600 °C
  • Small proportion of sizing agent and lubricant
  • No outgassing on first use
  • Good thermal stability
  • Solvent and halogen free

Application Examples

  • Generally as a heat protection and insulating fabric for industrial applications
  • Steel industry
  • Mechanical and plant engineering
  • Thermal insulation and covers

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