Prepreg materials are essential for precision and reliability in advanced composites. At MICHELIN ResiCare, our Resi4 Preg resin system is a non-toxic, renewable carbon-based araminolic resin engineered for pre-impregnated composites.
Resi4 Preg is certified under FAR25, EN 45545, and UL94 V0. It combines high thermal and fire resistance with low smoke toxicity. It enables manufacturers to meet stringent safety standards and support sustainability goals without compromising mechanical performance or process efficiency. These features make Resi4 Preg ideal for applications that require tight process control, repeatability, and consistent performance on an industrial scale.
Resi4 Preg: Resin Innovation for Prepregs
Resi4 Preg is a solvanted, formaldehyde-free, bio-based resin designed to replace phenolic resins while meeting REACH compliance and worker safety standards. Free from SVHC-listed chemicals, it supports your company’s sustainability goals and petroleum resource independence.
In addition to its safety profile, Resi4 Preg is formulated to provide consistent impregnation quality and controlled resin content. These two factors are key to achieving reproducible prepreg performance in demanding applications.
Compatible with multiple fibers, including:
Carbon fiber
Fiberglass
Flax fiber
And more
Applications include:
Aerospace: Heat shields, structural panels, interior security parts
Automotive: Lightweight thermal protection, brake systems
Railway: Interior/exterior panels, seats, trim panels
Construction: Sandwich panels, battery casings, cold storage solutions
Why Choose MICHELIN ResiCare Resins for Prepregs?
Resi4 Preg is designed to support performance and industrial practicality:
Formaldehyde-Free & Non-Toxic: Safe for workers, REACH-compliant
High Thermal & Fire Resistance: FAR25 certified
Thermal Stability: Tg > 300°C for demanding aeronautics and mobility applications
Bio-Based & Sustainable: Formulation approaching 100% bio-based, low CO₂ emissions (<1–2 kg CO₂/kg), European sourcing
Water-cleanable: Simplifies maintenance and reduces solvent use
Process-Compatible: Works with autoclave, thermocompression, impregnation, and more
Ready to Optimize Your Prepreg Solutions?
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Frequently Asked Questions
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pre-preg
A solvented, formaldehyde-free, biobased Araminolic resin designed to replace phenolic resins. It combines high thermal/fire performance with REACH compliance.
Certified FAR25 (Aerospace), EN45545 (Railway), and UL94 V0 (Fire Safety), with low smoke toxicity.
Works with carbon, glass, and flax fibers. Compatible with autoclave, compression molding, contact lamination and pre-impregnated molding.
Aeronautics and transportation (Thermal protection, Internal security parts, Trim panels, Seat sandwich panels, Battery casing).
It delivers a Tg above 300°C, meeting the most demanding aeronautics requirements.
Compression molding, contact lamination, pre-impregnated molding and autoclave. The range is designed for process versatility.