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KWO® CellFlon® R

ePTFE gasket cord


KWO® CellFlon® R is a round gasket cord made from expanded virgin PTFE with a modified texture. The gasket tape is particularly suitable for demanding and very clean applications, for example in the food industry and in the pharmaceutical manufacturing sector.

The patented CellFlon® processing method improves considerably the mechanical properties and strengthens the fibre structure. Consequently, the tape is much more compact and has a lower cold-flow tendency as well as better recovery properties. These characteristics allow a wide range of applications, regardless of the shape and the size of the sealing surface.





  • high residual thickness at time of installation
  • highest recovery properties
  • very good adaptability to shafts and flange surfaces
  • very low sliding friction
  • harmless in contact with food
  • high mechanical properties
  • high chemical resistance
  • UV resistant, non-ageing, unlimited storable
  • nontoxic, biologically inert
  • non-flammable


  • sealing for valve spindle, shaft seals
  • tube flanges
  • apparatus constructions
  • machine housing
  • food processing systems, pharmaceutical systems
  • FDA 21 CFR 177.1550 compliant
  • EC1935/2004 - suitable for applications with food contact

Technical Data

MATERIAL100 % expanded PTFE (ePTFE)– modified by CellFlon®-procedure
TEMPERATURE RANGErecommended temperature range: from -200°C (-328°F) to +180°C (+356°F); material heat resistant up to +315°C (+600°F)*
CHEMICAL RESISTANCEpH range from 0 to 14; full chemical resistance (except molten alkali metals and elemental fluorine)
PRESSURE RESISTANCEvacuum up to 80bar (1160psi) depending on the installation situation*
PHYSIOLOGICALLY INERTphysiologically harmless in all recommended applications
DENSITY0,70 g/cm³ ± 0,10 g/cm³

*Note: Temperature and pressure guides cannot necessarily be used simultaneously.