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FORMULA-8 is engineered with mineralized PTFE into a shear-sensitive thixotropic paste that wets into and seals threaded joints with strings of PTFE when torqued. Formula-8 is engineered to seal over the entire thread length for the life of the joint in liquid, gas, and vacuum service.


  • Replaces PTFE tape and corrects challenges associated with tape.
  • Will not cold flow over time, and will not jam check valves or pumps.
  • Won’t deteriorate from -400°F (-240°C) to +550°F (+287°C).
  • It is stable in pressures up to 10,000 psi and in vacuums 10(-3) torr.
  • Wets aggressively to threads and cannot be accidentally dislodged, making it especially useful in those hard-to-reach places.
  • Oxygen-approved by The German Federal Institute for Materials Testing (BAM) and ASTM G72-82 and ASTM G86 (WHS).
  • Non-toxic, non-hazardous, odorless, and chemically inert.
  • NSF-approved for use in food processing facilities.
  • NSN 8030-01-527-7193

For a list of chemicals and substrates Formula-8 is compatible with, click here.


  • natural gas applications
  • cryogenic applications
  • oxygen systems
  • chlorine (gaseous and liquid) and powerful oxidizers
  • hydraulic systems
  • fuel systems (in pressures up to 10,000 psi)
  • vacuum service
  • fine pipe threads
  • valves in bottled gases
  • instrumentation
  • machine and engine sensors

For tips on how to properly apply thread sealants, click here.

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