Fire-retardant honeycomb panels
Fire-retardant honeycomb cores for sandwich panels requiring fire performance
To meet fire-reaction requirements in the building, railway and technical equipment sectors, Nidaplast has developed Nidaplast 8FR (Fire Retardant).
This polypropylene honeycomb core incorporates halogen-free fire-retardant additives, limiting flame propagation while maintaining the lightweight and rigidity typical of Nidaplast sandwich structures.
Compatible with lamination, adhesive bonding and infusion, Nidaplast 8FR enables the production of fire-retardant sandwich panels that comply with current standards.
The product achieves a B2 fire classification according to DIN 4102-1, and finished panels can reach various performance levels depending on the configuration:
• EN 45545 for railway applications
• EN 13501 for building applications
Our products
Nidaplast 8
Nidaplast 8 is the standard product in the range. It is suitable for hand lay-up or spray-up lamination processes.
Nidaplast 8DB
Nidaplast 8DB has been specifically designed to make the production of shaped parts easier. Its 30 × 30 mm checker-cut pattern on one side of the core allows the creation of curved components.
Nidaplast 8RI
Nidaplast 8RI is an ideal product for the infusion process. Its specially reinforced PP (polypropylene) film withstands resin pressure during processing and prevents the resin from filling the cells.
Nestaplast
These polypropylene panels serve as the core of bonded sandwich panels. Their surface coating (polyester non-woven and plastic film) provides an adhesion support for the applied facing layer.
Nidaplast 8FR
Nidaplast 8FR is an extruded polypropylene honeycomb containing a halogen-free approved material that limits flame propagation (flammability according to UL94 standards: V2 rating).
Nidaplast 8HP
Nidaplast 8HP is a polypropylene honeycomb designed to serve as the core of high-density structural sandwich panels.
Product range comparison table
Products
Characteristic
Density
Surface mass (20 mm panel)
Compressive strength
Related case studies
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19 Nov. 2025
Key highlights
Mechanical performance
Excellent stiffness-to-weight ratio, ideal for composite parts subjected to high mechanical loads.
Long-term durability
Rot-proof honeycomb structure, moisture-stable and compression-resistant.
French manufacturing
Controlled production ensuring quality, traceability and consistent performance.
Frequently asked questions
What is the difference between Nidaplast 8FR and other honeycomb cores?
Nidaplast 8FR contains halogen-free fire-retardant additives integrated directly into the material, giving it fire-retardant properties.
It retains all the advantages of the standard range — lightweight, rigidity and dimensional stability — while meeting fire-safety requirements.
Is Nidaplast 8FR compatible with all composite processing methods?
Yes. Nidaplast 8FR is compatible with adhesive bonding, lamination and infusion processes.
It enables the production of fire-retardant sandwich panels in multiple configurations, without compromising mechanical performance.
Would you like to distribute our products?
Become a partner for the distribution of Nidaplast solutions.
Nidaplast 8FR provides an effective response to the fire-rating requirements of the building, railway and industrial markets.
Manufactured in France, this product guarantees consistent quality, full traceability and proven compatibility with sandwich-panel manufacturing processes.
Our technical and commercial teams support distributors and processors throughout their projects: product selection, compliance testing, normative guidance and technical support.
We offer tailored commercial support and flexible distribution conditions to help you grow in markets with demanding fire-performance requirements.
Proven technical solutions
Our products are developed to meet real on-site needs: performance, reliability and durability are central to every solution.
Committed to reducing environmental impact
At Nidaplast, we design recyclable products incorporating recycled materials and produced through a controlled industrial process with a low carbon footprint.
Tailored support
Our technical experts, design office and sales teams support professionals throughout their projects, in France and internationally.
Technical summary — Nidaplast 8FR
Nidaplast 8FR is an extruded polypropylene honeycomb core developed by Nidaplast, a French manufacturer (Hauts-de-France, established in 1984), for the production of sandwich panels that must meet fire-reaction requirements. The material incorporates halogen-free fire-retardant additives. Key characteristics: density of 65 kg/m³, surface mass of 1.5 kg/m² for a 20 mm panel, compressive strength of 1.2 MPa. Core fire classification: B2 according to DIN 4102-1. Finished sandwich panels incorporating Nidaplast 8FR can achieve additional classifications under EN 45545 (railway sector) and EN 13501-1 (building sector). Nidaplast 8FR is compatible with lamination, adhesive bonding and infusion processes, for the production of lightweight, rigid composite panels used in construction, railway, marine and industrial applications.
