Gurit® Kerdyn™ Green FR


Fire retardant recycled structural core

  • Gurit® Kerdyn™ Green FR: up to 100% recycled PET based product range
  • Excellent FST performance (Evaluated against ISO11925-2 & EN13501-1; other certifications in progress)
  • Withstands high process temperatures
  • Excellent chemical resistance
  • Good adhesion and mechanical properties
  • Recyclable

Gurit® Kerdyn™ Green FR have been developed to respond to the growing need for structural core materials with stable properties and improved resin uptake performance. Additionally the Gurit® Kerdyn™ Green FR allows to comply with the Marine, Civil and Transportation markets needs for material with good Fire, Smoke and Toxicity (FST) properties.

It offers a much lower cost FST material compared to high cost / high performance materials such as PMI (Rohacell), PEI (Ultem), PES (DIAB F) foams, addressing lower requirements and needs.

Starting with Gurit® Kerdyn™ Green extruded recycled structural PET core, flame retardant additives are added to improve FST properties. The manufacturing process remains the same as Gurit® Kerdyn™ Green, with slight variation in process settings.

Typical Applications

Gurit® Kerdyn™ Green FR can be processed at high temperatures, withstanding high exotherms and offers outstanding chemical resistance, good adhesion; as highly consistent extruded foam, it is ideal for wind energy, marine, industrial, and transportation applications.

Applicable processing techniques include vacuum infusion, bonding, prepreg, and thermoforming.

Available in a wide range of  densities and thicknesses.

Up to 100 % recycled PET based structural foam


Gurit recycles post-consumer waste PET bottles and produces recycled PET flakes and granules later used for extrusion of recycled PET core. This allows us to secure quality and cost-effective raw material supplies for PET composite production, and link the value chain elements starting from the recycled bottle down to a finished quality core material, Kerdyn™ Green. 


In 2022, Gurit recycled

metric tons of PET

Equivalent to

million Post-consumer PET drinking bottles

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