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On January 31, 2021, Hexion Holdings Corporation announced that it has completed the sale of its Coatings and Composite businesses, which includes the epoxy specialty resins and base epoxy resins and intermediates product lines, to Westlake Chemical Corporation. For epoxy coatings and composite product inquiries, please contact customer service at or

EPON™ Resin SU-8


EPON™ Resin SU-8 is a polymeric solid epoxy novolac resin possessing an average epoxide group functionality around eight. EPON SU-8 is compatible with bisphenol A-based epoxy resins, imparting improved high temperature strength, thermal stability, reactivity and chemical resistance. Prepreg laminates and graphite or boron reinforced composites with EPON SU-8 attain the maximum strength retention and thermal stability possible for an epoxy matrix system at elevated temperatures. Epoxy molding powders prepared with EPON SU-8 are characterized by an outstanding combination of flow stability and short press cycles.


  • Long shelf life
  • Micropulverized at ambient temperatures
  • Rapid development of hot hardness
  • Maximum elevated temperature strength retention
  • Improved tack qualities and lateral cohesiveness of unidirectional tapes

Sales Specification

Property Standard Value Unit Test Method
Color 6 max. Gardner ASTM D1544
Epoxide Equivalent Weight 195 - 230 g/eq ASTM D1652
Viscosity at 130°C 10 - 60 P ASTM D2196

1 40% weight in Butyl Carbitol

Typical Properties

Property Standard Value Unit Test Method
Density at 25°C 10.0 lb/gal ASTM D1475
Flash Point >200 °F ASTM D93
Melting Point 82 °C ASTM D3104

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