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ARLON® 3000 XT

Expanded High-Temperature Performance


With the onset of new aircraft programs over the next decade, demand has increased for actuator designs that meet and exceed a more rigorous performance envelope. Some of the requirements, such as the fire and flammability resistance defined in RTCA, Inc’s DO-160, go beyond the use of standard hydraulic seal designs. As a result, Greene, Tweed has expanded the use of their newest engineering thermoplastic, Arlon® 3000 XT, into products such as fire seals for the Aerospace market.

Arlon 3000 XT is an engineering thermoplastic developed to withstand these extreme conditions. With improved creep and extrusion resistance at temperatures above 350°F (177°C), it enhances performance over existing PAEK polymers. In DMA (Dynamic Mechanical Analysis), Arlon 3000 XT had a Tg 35°F (20°C) higher than PEEK, and provided superior mechanical property retention from 350°F (177°C) – 600° F (316°C). In extrusion testing at 35 ksi and 550°F (288°C), it outperformed both virgin and filled grades of PEEK and PEKEKK. In addition, Arlon 3000 XT exhibits chemical resistance comparable to PEEK.

Arlon 3000 XT delivers enhanced mechanical performance in high pressure (HP) and/or high temperature (HT) conditions. Through increased reliability and extended service life, it expands design headroom overall. The result is safer, more efficient operations in extreme

Aerospace fluid compatibility testing results can be found in the Aerospace, Engineering Thermoplastics, section of the website under Design Tools.

Features & Benefits

  • Enhanced mechanical property retention at high temperatures improves performance over current PEEK- and PEKEKK-based solutions
  • Increased reliability of critical components over 350°F (177°C)
  • Compatible with common Aerospace fluid chemistries; chemical resistance comparable to PEEK
  • Retrofit to existing legacy applications


  • Engines (Zones 1-3)
  • Braking systems
  • Fire-Seal Back-up rings
  • Back-up rings for HP and/or HT environments
  • General seal assemblies


Arlon 3000 XT fire seals