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KWO® CellFlon® brown

ePTFE gasket tape with fillers

KWO® CellFlon® brown is a gasket tape made from expanded PTFE with a silicat filler and a modified structure. By adding the silicat and through the patented CellFlon® processing method the mechanical properties of the gasket tape are considerably improved.
The result is a substantially reduced cold-flow tendency, a clearly improved recovery and excellent sealing properties in systems with temperature cycles. The tape features a self-adhesive backing for easy installation. The used glue has a very high adhesive force.  
KWO® CellFlon® brown gasket tape is especially designed for applications in high-temperature environments up to 200°C, for example heat exchangers, flue gas plants, compensators and pipe flanges.


  • high residual thickness at time of installation
  • small widening
  • higest recovery properties
  • excellent adaptability to all surfaces
  • excellent sealing characteristics, even in case of alternate loadings
  • 100 % expanded PTFE (ePTFE) with fillers
  • high mechanical properties
  • high chemical resistance
  • reduced cold flow and improved recovery
  • non-ageing
  • non-flammable
  • sealings for tanks
  • heat exchangers
  • apparatus engineering
  • machine housing
  • flue gas plants
  • proven by TA-Luft
  • gasket characteristics pursuant to DIN EN 13555

Technical Data

RAW MATERIAL 100 % expanded PTFE (ePTFE) with fillers and brown-coloured - modified by CellFlon®-procedure - self-adhesive
TEMPERATURE RANGErecommended temperature range: from -160°C to +200°C; material heat resistant up to +315°C
CHEMICAL RESISTANCEpH range from 0 to 12; high chemical resistance, except molten alkali metals and elemental fluorine
PRESSURE RESISTANCEresistant within the usual pressure range of standard flanges up to 60 bars; suitable for vacuum applications (depends upon the concrete installation conditions)
PHYSIOLOGICALLY INERTphysiologically harmless in all recommended applications


Not for use in food, drug, cosmetic or medical device manufacturing, processing or packaging operations.