Mid-Temperature component prepreg for woven and unidirectional

RP542-4 is a controlled flow, toughened epoxy prepreg system formulated for the manufacture of high performance structural composite parts requiring very good impact strength properties. The system has been formulated for a medium temperature cure of 80 - 120°C under vacuum or autoclave pressure and is also suitable for press moulding. Fully cured, this system has a dry service temperature capability up to 120°C. The component surface finish with this system is excellent.

RP542-4 Technical data

Key Features & Benefits

  • Excellent surface finish
  • Core bondable
  • Standard Cure 80°C - 120°C
  • Service Temperature up to 120°C
  • Peak Tg 138°C : 1 hour 120°C : DMA
  • Controlled flow system
  • Out life 60 days at 20°C 
  • Available on most of PRF’s reinforcement fabrics


"We are all really happy with the result, brilliant clarity with the weave pattern and very uniform."

John Feay, Composite Engineering Manager, Jeremy Rogers Limited