SHD Prepreg composite material
Epoxy prepreg

FRVC411

Flame Retardant, Core Bondable
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Key Features & Benefits

Key Feature Good FST and structural performance with versatile cure. CS 25.853 compliant, EN45545-2 HL1 - rated HL3 for flame propagation, smoke and toxicity, rated UL94 V0
Application Flame retardant for Aerospace and Automotive structures
Initial Cure Temp 65°C- 140°C
Initial Cure Time 16 Hours- 15 mins Hours
Post Cure Option Yes
Outlife 21 days at 20°C
TG Onset* 155°C -DMA
TG Peak* 176°C -DMA
Toughened Yes
Cure Autoclave, Press, and Oven
Availability All sites

FRVC411 is a toughened, flame retardant epoxy resin system designed to cure between 65°C (149°F) and 140°C (284°F) allowing flexibility in component manufacture. CS 25.853 compliant, EN45545-2 HL1 – rated HL3 for flame propagation, smoke and toxicity, rated UL94 V0. It can be supplied on a variety of fabrics and in UD format to meet your cost and manufacturing requirements. This resin system colour is opaque white.

Why choose this material

A versatile cure fire retardant structural epoxy rated UL94 V0 and EN45545-2 HL1 and HL3 for flame propagation, smoke and toxicity.

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 aerospace (passenger plane seating)

Recommended markets

Aerospace

Advanced composites specified across major commercial aircraft today
Find out more

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 fire-resistant aerospace parts?

FRVC411 is designed for aerospace components where fire safety is important. It meets CS 25.853 requirements and offers strong flame, smoke and toxicity performance, making it suitable for a wide range of aircraft applications. 

02

What prepreg meets UL94 V0 fire standards?

FRVC411 is rated UL94 V0, making it suitable for applications that need a high level of flame resistance. It can be supplied with carbon, glass and other reinforcements to suit different parts and manufacturing needs. 

03

Can flame-retardant prepreg be used for rail applications?

Yes. FRVC411 is designed for both aerospace and rail use. It meets EN45545-2 requirements and is rated HL3 for flame propagation, smoke and toxicity, making it suitable for demanding rail applications. 

04

What prepreg is suitable for battery boxes and fire containment?

FRVC411 is used for battery boxes and fire-containment applications where flame resistance and toughness are important. Its fire performance and flexible processing make it suitable for demanding aerospace, defence and motorsport uses. 

05

Can fire-retardant prepreg be cured at a low temperature?

Yes. FRVC411 can cure from 65°C (149°F), which can make it easier to use with lower-temperature tooling. It also supports higher cure temperatures, giving manufacturers more flexibility to match their existing production setup. 

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