AIREX® C71 is a closed-cell, cross-linked rigid foam with high temperature resistance, excellent rigidity and a great stiffness to weight ratio. It is highly durable, has a low water absorption rate and excellent chemical resistance. It can be processed with all commonly used resin systems and processes. The fine cell structure supports excellent adhesion of face sheets.

AIREX® C71 is the ideal core material for lightweight sandwich structures for dynamic or static loads subjected to increased temperatures.

Compatible with most resins and manufacturing processes AIREX®C71 is ideally suited as a core material for a wide variety of sandwich structures subjected to both static and dynamic loads, and exposed to elevated temperatures. Thanks to its unique lightness (properties vs. density) C71 is the material of choice for applications where lightweight is a priority.

AIREX® C71 is the ideal core material for lightweight sandwich structures for dynamic or static loads subjected to increased temperatures.


C71.55 & C71.75

C71.55: 3.7 lb/ft3

C71.75: 5 lb/ft3


1/8” – 2 ½”


Structural Orientation:

Rigid NGL




Rigid NGL

C71.55: 44.1” x 94.5”

C71.75: 39.4” x 84.6”

Additional Configurations:


Any thickness: + $0.33 per ft2


Perforations 2x2:

Up to 2” thick: + $0.22 per ft2


Perforations 2x2:

Over 2” thick: + $1.10 per ft2

Safety Datasheet


·         Physical state / form: Polymer foam sheet with visible cell structure.

·         Color: Various, depending on density.

·         Glass transition temperature: 65 to 80 °CISO 537

·         Decomposition temperature: > 220 °C

·         Flash ignition temperature: 380 °CASTM D 1929

·         Density: 50 -100 kg/m3ISO 845

·         Insoluble in: Water, sea water, acids, alkalis, aliphatic hydrocarbons

·         Soluble in: Aromatic hydrocarbons, Ketones, chlorinated hydrocarbons

·         General information: Stable under normal conditions

·         Conditions to avoid: High temperatures (> 180 °C)

·         Materials to avoid: Not applicable.

·         Dangerous decomposition products: Tetramethylsuccinonitrile (TMSN), MethacrylnitrileIsobutyronitrile, Hydrogen chloride (HCl), Hydrogen cyanide (HCN) in small amounts, Carbon dioxide (CO2), Carbon monoxide (CO)

·         Ecotoxicity: The total amount of all heavy metals is <100 mg/kg [ppm].

·         Mobility: Not soluble in water, therefore effects on groundwater are unlikely.

·         Persistence and degradability: Biologically not degradable.

Technical Datasheet


·         Outstanding strength and stiffness to weight ratio

·         High temperature resistance

·         Good impact strength

·         High fatigue resistance

·         Low resin absorption (fine cell structure)

·         Good fire performance (self-extinguishing)

·         High sound and thermal insulation

·         Good styrene resistance


·         Wind energy: Rotor blades, nacelles, turbine generator housings

·         Road and Rail: Roof panels, interiors, floors, doors, partition walls, side skirts, front-ends

·         Marine: Hulls, decks, bulkheads, superstructures, engine hatches

·         Aircraft: Interiors, radomes, galley carts, general aviation (sport aircraft) fuselage

·         Recreation: Skis, snowboards, surfboards, wakeboards, canoes, kayaks

·         Industrial: Tooling, tanks, ductwork, containers, covers


·         Contact molding (hand/spray)

·         Resin injection (RTM)

·         Adhesive bonding

·         Pre-preg processing (up to 140 °C, 285 °F)

·         Vacuum infusion

·         Thermoforming