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USA & Canada
USA & Canada

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


Production Parts Icon - Stratasys

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)

flexural modulus

Flexural Modulus (XZ Orientation)

  • 5.10 GPa (740 ksi)

Compatible 3D Printers

Fortus 450mc updated

Fortus 450mc 3D Printer

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