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GracoRoberts supplies prepreg materials for aerospace, defense, UAV, and advanced manufacturing applications. Prepregs combine reinforcement fibers pre-impregnated with a controlled resin system, delivering consistent fiber volume fraction, repeatable mechanical properties, and reduced handling complexity compared to wet layup processes.
Our portfolio includes carbon fiber prepregs, fiberglass prepregs, and specialty systems from leading manufacturers including Hexcel, Syensqo, and Isovolta. Products are available qualified to Boeing BMS, Airbus AIMS, military, and commercial program specifications.
For compatible bonding and surfacing systems, see our composite bonding systems page and process materials page.
Carbon fiber reinforced prepreg systems for structural aerospace applications requiring high stiffness-to-weight ratios and fatigue resistance. Used in wing skins, fuselage panels, control surfaces, and primary structural components. Products include Hexcel HexPly F155, F161, F263, and M70 series in a range of fabric styles and resin contents.
Fiberglass prepreg systems for secondary structures, radomes, interior panels, and applications where electrical transparency, corrosion resistance, or cost efficiency are priorities. Products include Hexcel HexPly F155 and F161 fiberglass prepregs and Syensqo Cycom 4102A in a range of style and weight options.
Bismaleimide, cyanate ester, and high-temperature epoxy prepreg systems for applications requiring performance above the capability of standard epoxy systems. Used in engine nacelles, hot structures, and satellite assemblies where sustained elevated-temperature performance is critical.
Epoxy tooling prepregs for producing composite moulds and tooling masters with controlled coefficient of thermal expansion and high surface quality. Products include Airtech TMFP 3100 epoxy tooling prepreg.
Carbon fiber prepregs deliver the stiffness-to-weight performance required for primary airframe structures, reducing overall aircraft mass and supporting structural efficiency targets in commercial and military programs
Prepreg systems support repeatable, lightweight composite construction in UAV fuselage and wing assemblies, enabling consistent mechanical properties across production batches and reducing variability compared to wet layup.
Qualified carbon and fiberglass prepregs support rotor blade, airframe panel, and nacelle manufacture in defense and rotorcraft programs, with traceability and program approval documentation available on request.
Our prepreg range integrates with our process materials for layup and cure, and our composite bonding systems for structural assembly.
Low-outgassing prepreg systems qualified to ASTM E595 NASA outgassing standards are suitable for satellite panels, booms, and structural elements where contamination control in a vacuum environment is a program requirement.
Prepregs require controlled storage at sub-zero temperatures to maintain out-life and tack. We manage cold chain logistics and advise on thaw times, out-life management, and shop-ready preparation. Materials are available in standard roll widths and through our short roll composites service for slit, pre-cut, or kitted formats.
Compatibility with autoclave, press cure, and out-of-autoclave processes should be confirmed at the material selection stage. We advise on cure cycle requirements, lay-up sequences, and tooling compatibility for specific prepreg systems.
We support qualification workflows for prepreg materials, including lot traceability, shelf life and out-life management, and certificates on request. Products in our portfolio are qualified to Boeing BMS, Airbus AIMS, US military specifications, and NASA outgassing requirements where applicable.
What we provide:
Need help selecting or qualifying a prepreg system? Talk to our team about prepreg solutions aligned to your program and documentation requirements.
We supply carbon fiber and fiberglass prepregs from Hexcel, Syensqo, and Isovolta, including HexPly F155, F161, F263, M70, and Cycom 4102A. Products are available qualified to Boeing BMS, Airbus AIMS, and military specifications.
Prepregs require storage at sub-zero temperatures, typically minus 18 degrees Celsius or below, to maintain out-life. Materials must be allowed to thaw completely before opening to avoid moisture condensation. We advise on thaw times, out-life tracking, and shop-ready formats as part of our supply service.
Yes. Our kitting and converting service can supply prepregs in slit widths, pre-cut ply kits, or short rolls to reduce handling and waste in production. See our short roll composites service for more information.
Yes. We offer certificates on request, COA and COC, lot traceability, and out-life management documentation to support qualification and program compliance.
Several prepreg systems in our portfolio meet ASTM E595 NASA outgassing requirements. Contact us to confirm outgassing qualification status for a specific product and application.
Yes. We can align prepreg supply to ATL and AFP workflows and provide materials in formats compatible with automated layup equipment. Contact us to discuss your process requirements.
