FyreWrap® LiB Papers

FyreWrap® LiB (Lithium-ion Battery) Papers from Unifrax are a family of high-temperature, lightweight insulating materials designed to prevent thermal runaway propagation in lithium ion battery applications. Building on our thermal management expertise and manufacturing excellence, combined with extensive experience in aerospace, automotive and fire protection applications, Unifrax offers customized solutions for lithium ion thermal runaway propagation prevention.


  • Fire resistant, flame barrier
  • Electrically insulating
  • Low thermal conductivity / thermal insulating
  • Suitable for temperatures up to 1430°C (2606°F)
  • Uniform lightweight flexible sheets
  • Easy to wrap, shape or cut
  • Excellent chemical stability
  • Exceptionally resistant to thermal shock
  • Non-woven compressible fiber matrix


  • Thermal runaway propagation prevention
  • Short circuit prevention and electrical protection
  • Cascading fire prevention
  • Thermal isolation and containment


  • Cells (external to cell)
  • Battery modules
  • Battery packs
  • Packaging for transportation

To learn more about FyreWrap LiB Performance Materials or to discuss your application, please contact us at: +1.716.768.6305.


Safety Data Sheets

FyreWrap® LiB Papers

Product Information Sheet

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