Epoxy Prepregs

SE 85

  • Rubber toughened system
  • Good resistance to microcracking
  • Good surface finishes possible
  • SE 85 - High Flow
  • SE 85GT - Controlled Flow
  • SE 85GT - Self adhesive - high peel strengths

The SE 85 series are toughened hot-melt, epoxy prepregs that offer an extremely good balance of mechanical properties. They are ideal for structural components where improved impact performance and resistance to resin microcracking is desired. SE 85 can be cured at 80°C, yet retains an outlife of up to 56 days at 23°C. With its 3/4 hour cure at 120°C, it is also suitable for the quick manufacture of parts, and is also used in the development of trial components.

SE 85 has high flow characteristics (SE 85GT medium flow) , so that heavy reinforcements can be easily wet out, and good consolidation can be achieved in very thick (>25mm) laminates, under just vacuum bag pressures. Its flow behaviour also means that it can produce excellent surface finishes when used in pressure-moulded components.

SE 85BL & SE 85GTBL is a black pigmented variant, often used in carbon fabrics to provide an excellent deep black gloss finish on the outer surface of carbon components such as yacht spars and race car parts.

SE 85 system can equally be used in sandwich structures with honeycomb and foam cores. In this application, depending on resin content, it can be used in a self-adhesive mode, although it is more commonly used in conjunction with the toughened SA 80 Adhesive Film.

Technical Data

​Min Cure Temp/Time
Typical Laminate 10 plies of RC200T 42% resin content
Typical Ramp Time 1–2°C (2–4°F) per minute N/A -
Cure Temperature 80°C (176°F) 100°C (212°F) 120°C (248°F) -
Cure Dwell Time 12 hours 3 hours 1 hour -
Cure Pressure -1bar (14.5Psi) 6bar (87Psi) -
De-mould Temperature < 60°C (140°F) 120°C (248°F) -
Dry Tg1 (DMA) 103°C / 217°F
116°C / 241°F 110 - 120°C / 241°F ISO 6721 (DMA)
​​Cured Resin Prop
Tensile Strength 83 MPa 12.0 Ksi ISO 527-2
Tensile Modulus 3.2 GPa 0.46 Msi ISO 527-2
Compressive Strength 127 MPa 18.4 Ksi ISO 604
Compressive Modulus 3.4 GPa 0.49 Msi ISO 604
​Woven Lam Prop
Fabric / Fibre Description Woven 2x2 Twill HS Carbon Woven 2x2 Twill HS Carbon Woven 4x4 Twill HS Carbon
Resin Content 42% 42% 42%
Cure Method Vacuum Bag cured at -1bar Press moulded at +6bar
Cure Schedule 12hrs/80°C (176°F) 1hr/120°C (248°F)
Cured Ply Density 1.81g/cm3 0.065lb/in3 1.81g/cm3 0.065lb/in3 1.81g/cm3 0.065lb/in3
Glass Transition Temperature 103°C 217°F 120°C 248°F 120°C 248°F
Cured Ply Thickness 0.20mm 0.0079in 0.18mm 0.0071in 0.23mm 0.0091in
0° Tensile Cured Fibre Volume 54.7% 63.3% 65.5%
0° Tensile Strength 790 MPa 115 Ksi 789 MPa 114 Ksi 1067 MPa 155 Ksi
0° Tensile Modulus 63 GPa 9.1 Msi 78 GPa 11.3 Msi 61 GPa 8.9 Msi
0° Comp Str Fibre Volume 54.8% 62.6% 68.4%
0° Compressive Strength 701 MPa 102 Ksi 730 MPa 106 Ksi 840 Mpa 122 Ksi
0° ILSS Fibre Volume 53.7% 61.9% 66.6%
0° ILSS 65 MPa 9.4 Ksi 69 MPa 10.0 Ksi 72 MPa 10.4 Ksi
​Third Party Certs

SE 85 does not currently have any third party approvals

SF 80 SPRINT™ Toughened Surfacing Film
SA 80 Epoxy Adhesive Film
SP 4832 Mono-Component Epoxy System
SP 4202 Mono-Component Epoxy System
SP 9435 Mono-Component Epoxy System