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HSHT hero 2x

Continuous Fiber

HSHT Fiberglass

Thermally resistant Continuous Fiber for strong parts in high-temperature environments

High Strength High Temperature (HSHT) Fiberglass is defined by two characteristics: high strength (nearly equal to 6061-T6 Aluminum) and strength in high temperatures. Though not as stiff as Continuous Carbon Fiber, Onyx parts reinforced with HSHT are strong at both low and high temperatures. As a result, HSHT reinforcement is best used for parts in high-temperature environments like molds, autoclaves, and others.


  • Polymer Molds
  • Prototype (Low-Run) Injection Molds
  • High-Temperature Fixturing
  • High-Temperature Prototypes
HSHT flexural strength desktop 2x 120920

Flexural Strength

  • 420MPa

    HSHT Reinforced

HSHT heat deflection 2x

Heat Deflection Temperature

  • 145ºC

    HSHT Reinforced

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HSHT Fiberglass

100 / 50cc

HSHT Fiber Spool