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GMS Composites EP – 350

Producer:  GMS Composites
GMS Composites EP-350 is a formulated epoxy resin matrix prepreg with long shelf life. The product has a versatile curing cycle from as low as 80°C or as high as 160°C, thus enabling the product to be used to produce a wide range of composite items, from large structures to numerous small components. EP-350 is available in a range of substrates such as carbon, glass or aramid. The product also has good dynamic strength properties as well as outstanding hot-wet resistance. The prepreg has good flow and the tack of EP-350 can be varied.
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Identification & Functionality


Features & Benefits

Product Highlights
  • Variable cure cycle 80°C – 160°C
  • Good surface finish
  • Suitable for a range of structures and processes
  • Excellent shelf life
  • Wide range of fibre substrates available
  • Made in Australia

Applications & Uses


EP-350 can be used to produce structural components with carbon, glass or aramid fibres. It can also be used in the construction of sandwich structures. The versatility of EP-350 means large complex structures as well as small basic components can be produced. It is possible to utilise EP-350 in a number of industries and applications such as marine, sports and leisure, industrial components, automotive and wind turbine blades.


Cured Properties
ValueUnitsTest Method / Conditions
Flexural Strength at 23°C145 - 160MPaCured neat formulation cycle for 1hr at 140°C
Ultimate Elongation at 23°C4.8 – 6.3%Cured neat formulation cycle for 1hr at 140°C
Flexural Modulus at 23°C3500 - 3700MPaCured neat formulation cycle for 1hr at 140°C
Tg (DSC, 10 K/min)140 - 150°CCured neat formulation cycle for 1hr at 140°C
Interlaminar shear strength (12 layers UD e-glass (425gsm) 3.2mm thick laminate )42 - 47MpaCured neat formulation cycle for 1hr at 140°C

Technical Details & Test Data


The versatility of GMS Composites EP-350 means a range of cure cycles, pressures and ramp up rates can be adopted all of which will depend greatly on the part being produced. Below is a guide to cure cycles.

Temperature (°C) Time
100 4 hrs
120 2 hrs
140 1 hrs
150 30 mins
  • Heat ramp up rate – 2°C / min
  • Pressure – 1 bar
Gel Time

Hot plate

Temperature (°C) Time (min)
100 45-55
120 13-20
140 3-6

Values are indicative of small samples of neat resin formulation. Gel times may vary significantly in composites depending on fibre content and laminate thickness.

Storage & Handling


Customers should ensure appropriate workplace OH&S guidelines are followed when working with this product. Appropriate measures should be taken to avoid contact with skin and eyes. Avoid inhalation of dust or fumes that may be released or created when machining, cutting or curing.

Shelf Life
  • Room temperature (23°C) > 8 weeks
  • Refrigerated (-18°C) 12 months

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Technical Data Sheet
GMS Composites EP – 350
EP – 350 Technical Data Sheet
Technical Data Sheet
Products: GMS Composites EP – 350
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