Fusion™ FKM 665, Greene Tweed’s ultra-low-temperature and chemical-resistant elastomer, is specifically formulated to meet and exceed the requirements of Aerospace Material Specification (AMS) 7379 and AMS-P-83461.

With its broad temperature range (-70°F to 450°F/-57°C to 232°C), Fusion™ 665 performs well at low temperatures with zero leakage.

Fusion 665 was developed by Greene Tweed to overcome existing limitations of comparable materials, such as those found in FKMs, NBRs, or FVMQs/Fluorosilicone, by offering the following benefits:

  • Best-in-class high-temperature capabilities (450°F/232°C)
  • Outstanding low-temperature sealing
  • An extremely low compression set
  • Broad chemical compatibility
  • High-temperature sealing

To learn more about Fusion™ 665 and its technical properties, click here.