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USA & Canada

Covestro Addigy® PA6/66-GF20 FR LS

Validated FDM Thermoplastic

Addigy® PA6/66-GF20 FR LS is a glass-filled nylon material designed for FDM additive manufacturing applications in the railway and aerospace industries. This flame-retardant Stratasys Validated Material has low smoke generation characteristics, and its glass-filled composition provides excellent thermal performance at elevated temperatures.
Covestro Addigy PA6/66 3D Printed Armrest

3D Printed Armrest

Benefits of Addigy PA6/66-GF20 FR LS

From a regulatory perspective, Addigy PA6/66-GF20 FR LS meets the following transportation safety standards:

  • EN 45545 - European fire protection standards for railway vehicles.
  • NFPA 130 - Fire protection standard for underground, surface, and elevated transit and passenger rail systems.
  • SMP 800-C - Bombardier standard for toxic gas generation.
  • FAR 25.853 - FAA standard for flammability ratings associated with aircraft compartment interiors.



Non-Toxic and No Harmful Gasses

This material also uses non-halogenated flame retardant, which is non-toxic and does not release harmful gasses. Non-halogenated additives are also an environmentally greener alternative and are not subject to regulation. 

Faster, Lower-Cost Alternative

Addigy PA6/66-GF20 FR LS FDM filament offers a faster, lower-cost alternative to molding and machining to replace obsolete parts and support other low-volume production applications, particularly in regulated industries. 



FDM Validated Material

Addigy PA6/66-GF20 FR LS

Typical Application Use

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Production Parts

Out-of-production, low-volume, and customized production part applications.


Material Performance Properties


Tensile Yield Strength (XZ Orientation)

  • 50.7 MPa (7350 psi)

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Flexural Modulus (XZ Orientation)

  • 5.10 GPa (740 ksi)

Compatible 3D Printers

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Fortus 450mc FDM 3D Printer

Leverage the versatility of being able to 3D print using multiple FDM materials with the Fortus 450mc 3D printer.

Fortus 450mc - FDM 3D Printer