Thermiculite® is specified by name where critical sealing matters. Applications include petro chemicals, fertilisers and OEM and oil & gas applications where process conditions are extreme.

Flexitallic’s experienced engineers use the versatility of Thermiculite® to create bespoke sealing configurations in equipment and piping systems to increase operational up-time for customers. This product has proven itself as an effective long-term sealing solution in more than 600 of the most demanding industrial sealing applications.

Thermiculite® is a patented product with amazing versatility. Not only can it withstand high temperatures and corrosive environments, due to its unique formulation it can also act as stand alone sheet material, as a filler for SWG’s or as a facing for Kammprofiles and other product lines.

Flexitallic has also developed a range of valve stem packings, using Thermiculite® technology, for use in the most arduous services.

Product range:

  • 700 to 800 Series – sheet grade
  • 866 – specialist grade (SOFC)
  • 896 – aerospace
  • Kammprofiles
  • SWG
  • Static and Dynamic Packings
  • I-Flex Isolation Kits
  • Flange Rescue Gasket (FRG)


  • Engineered and manufactured in the UK
  • Wide temperature range – cryogenic to 1000°C
  • Fire-safe API 6FB
  • TA Luft approved
  • Free from oxidation
  • Excellent chemical compatibility
  • Wide availability of styles of gaskets
  • Electrical and thermal insulation
  • Replaces graphite, PTFE and non-asbestos materials