SHD Prepreg composite material
Epoxy prepreg

HTC400

High Temp Cure, High Service Temp
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Key Features & Benefits

Key Feature High temperature structural epoxy
Application High service temp Automotive and Aerospace structures
Initial Cure Temp 355°F
Initial Cure Time 2 Hours
Post Cure Option No
Outlife 30 days at 70°F
TG Onset* 505°F -DMA
TG Peak* 522°F -DMA
Toughened Yes
Cure Autoclave
Availability All sites

HTC400 is an epoxy resin system designed to cure at 180°C (356°F). It is a toughened epoxy resin system designed for demanding, high temperature applications. It can be supplied on a variety of fabrics and in UD format to meet your cost and manufacturing requirements.

Why choose this material

HTC400 is SHD's highest Tg epoxy delivering structural performance in challenging environments.

Supplied with SHD's renowned service, including:

  • Short two-week lead times and low MOQs

  • Exceptional product quality

  • First class technical support

  • Excellent customer service

  • The same manufacturing equipment and processes across all sites

Advanced composite solutions for a car Advanced composite solutions for aerospace (passenger plane seating)

Recommended markets

Automotive Aerospace

Automotive

World-class performance with unmatched premium aesthetics for prestigious supercar and hypercar brands
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Aerospace

Advanced composites specified across major commercial aircraft today
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Technical Guidance Information

01

Storage and Out Life

This material should be kept frozen at -18°C (0°F). It must be kept sealed in a polythene bag which must not be opened until fully thawed to room temperature. If the material is not fully used, then the material must be resealed in the polythene bag to prevent moisture absorption.

02

Health and Safety

This material contains epoxy resin which can cause allergic reactions with skin contact and must avoid repeated and prolonged skin contact.

Please refer to the product Safety Data Sheet before using this material. The following precautions must be taken when using epoxy resin prepregs:

  • Overalls must be worn

  • Impervious gloves must be worn

  • Curing schedule is meant to be as a guide only and is subject to local conditions

  • To avoid exotherm, particular care must be taken with thick laminates

  • Ramp rates must not exceed 3.0°C (5.4°F)/min during initial cure and 0.3°C (0.5°F)/min during post cure

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Frequently Asked Questions

01

Is this a suitable prepreg for high-temperature composite parts?

Yes. HTC400 is SHD’s highest-temperature epoxy prepreg. It is designed for demanding structural parts that need to stay strong and reliable in high-heat environments, including automotive and aerospace applications. 

02

When should I use a high-temperature epoxy prepreg?

A high-temperature epoxy prepreg is useful when a standard epoxy may not offer enough heat resistance. HTC400 is designed for parts that need both structural strength and reliable performance at elevated temperatures. 

03

Can HTC400 be used for aerospace components?

Yes. HTC400 is recommended for aerospace applications where parts must perform in demanding, high-temperature conditions. It combines high heat resistance with the structural performance expected from a toughened epoxy system. 

04

Can high-temperature prepreg be supplied with different fibre types?

Yes. HTC400 can be supplied on a range of fabrics and in unidirectional form. This allows the reinforcement to be chosen around the part’s strength, weight, cost and manufacturing needs. 

05

What is the difference between high-temperature epoxy and cyanate ester prepreg?

High-temperature epoxy systems such as HTC400 offer strong heat resistance while retaining familiar epoxy processing and handling. Cyanate ester systems are generally chosen when even greater temperature performance or other specialist properties are required. 

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