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GMS Composites EP – 274

Producer:  GMS Composites
GMS Composites EP-274 is a formulated epoxy resin matrix prepreg with long out life and improved handling. The product has a versatile curing cycle from as low as 70C or as high as 130C, thus enabling the product to be used to produce a wide range of composite items, from large structures to numerous small components. EP-274 is available in a range of substrates such as carbon, glass or aramid. EP-274 allows faster cycle times at elevated temperatures. The product also has good dynamic strength properties. The improved handling allows for easier moulding of complex parts. The prepreg has good flow and the tack of EP-274 can be varied.
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Identification & Functionality


Features & Benefits

Product Highlights
  • Variable cure cycle 70o C – 130o 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-274 can be used to produce structural components with carbon, glass or aramid fibres. It can also be used in the construction of sandwich structures as well as tooling applications. The versatility of EP-274 means that large, complex structures as well as small basic components can be produced. It is possible to utilise EP-274 in a number of industries and applications such as marine, sports and leisure, industrial components and automotive.


Cured Properties
ValueUnitsTest Method / Conditions
Flexural Strength at 23°C130 - 140MPaCured neat Formulation Cycle for 2hrs at 120°C
Ultimate Elongation at 23°C7.0 – 9.0%Cured neat Formulation Cycle for 2hrs at 120°C
Flexural Modulus at 23°C3000 - 3200MPaCured neat Formulation Cycle for 2hrs at 120°C
Fracture Toughness K1c0.7 - 0.8MPa√mCured neat Formulation Cycle for 2hrs at 120°C
Fracture Energy G1c150 - 160J/m2Cured neat Formulation Cycle for 2hrs at 120°C
Tg (DSC, 10 K/min)120 - 125°CCured neat Formulation Cycle for 2hrs at 120°C
Interlaminar shear strength (12 layers UD e-glass (425gsm) 3.2mm thick laminate )55 - 65MpaCured neat Formulation Cycle for 2hrs at 120°C

Technical Details & Test Data


The versatility of GMS Composites EP-274 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 minimum cure cycles.

             Temperature (C)          Time                   Tg (C) - DSC7
                     70     16 hours                              85
                     80     8 hrs                              97
                     90      4 hrs                            105
                   100     2 hrs                            115
                   110     1 hr                            118
                   120     30 mins                            123
                   130     15 mins                            125
  • Heat ramp up rate – 2C / min
  • Pressure – 1 bar
Gel Time

Hot plate

Temperature (°C) Time
110 12-14
120 6 - 7
130 3 - 4

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 (23C) > 5 weeks
  • Refrigerated (-18C) 12 months

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Technical Data Sheet
GMS Composites EP – 274
EP – 274 Technical Data Sheet
Technical Data Sheet
Products: GMS Composites EP – 274
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