SHD Prepreg composite material
Epoxy prepreg

OTS65

Epoxy Oven Cure Tooling
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Key Features & Benefits

Key Feature Out of autoclave processing and excellent surface finish
Application Out of Autoclave tooling & structures
Initial Cure Temp 65°C- 90°C
Initial Cure Time Consult Data Sheet Hours
Post Cure Option Yes
Outlife 21 - see handling guide days at 20°C
TG Onset* 129°C -DMA
TG Peak* 143°C -DMA
Toughened No
Cure Oven
Availability All sites

OTS65 tooling prepreg has been formulated to give a robust surface finish with out of autoclave processing. It can be supplied on carbon or glass formats.

Why choose this material

OTS65 delivers exceptional tool finish from oven-only processing. It also delivers an extended 21-day outlife.

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 solution for Motorsport Advanced composite solutions for a car Advanced composite solutions for aerospace (passenger plane seating) Jet plane Tooling Prepregs Natural Fibre Composites SHD support a number of markets, including Marine, Sport and Leisure, Defence, Industrial and Rail.

Recommended markets

Motorsport Automotive Aerospace Defence Tooling Sustainability Other Sectors

Motorsport

SHD Composites is the advanced prepreg partner behind winning race teams
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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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Defence

SHD Composites is actively working on many defence programs with customers around the world
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Tooling

A tool for every geometry, a material for every tool
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Sustainability

Our enhanced sustainability product range has applications in all our key sectors including Aerospace, Automotive, Motorsport, Marine and Sport & Leisure.
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Other Sectors

Our products can be applied to a variety of markets, and this range of applications will always remain important for SHD.
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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 1.0°C (2.0°F)/min during initial cure and 0.3°C (0.5°F)/min during post cure

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Frequently Asked Questions

01

What prepreg is suited for out-of-autoclave composite tooling?

OTS65 is designed specifically for tooling that can be cured in an oven rather than an autoclave. It gives a strong surface finish while helping reduce the need for specialist high-pressure equipment. 

02

Can composite tooling be made without an autoclave?

Yes. OTS65 is made for out-of-autoclave processing and can be cured in a standard oven. This makes it a practical option for manufacturers who want high-quality composite tooling without investing in autoclave equipment. 

03

What prepreg is suitable for tooling that takes several days to lay up?

OTS65 offers up to 21 days of working life at 20°C (70°F). This gives teams more time to complete larger or more detailed tools before curing. 

04

How can I get a good surface finish on oven-cured composite tooling?

Using a tooling prepreg developed for oven curing can help. OTS65 is designed to deliver a robust, high-quality tool surface without autoclave processing, making it well suited to visible or precision tooling surfaces. 

05

Can out-of-autoclave tooling prepreg be supplied with carbon or glass fibre?

Yes. OTS65 can be supplied with either carbon or glass fibre reinforcement, giving manufacturers flexibility to choose the option that best suits the tool’s performance, cost and production requirements.

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