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Material Information

Fluorosint® is the result of synthetically manufactured mica that has been chemically linked to PTFE. While Fluorosint®’s chemical resistance parallels PTFE, Fluorosint®’s unique chemical composition results in properties not normally attainable in PTFE such as better wear resistance and a lower coefficient of thermal expansion. It has continuous use temperatures up to 500º F. Fluorosint® in general offers low frictional properties and dimensional stability. Flurosint® 500 PTFE has nine times greater resistance to deformation under load, 1/5th the coefficient of linear expansion, and is 1/3rd harder than unfilled P TFE. It also has better wear characteristics and maintains low friction properties. Fluorosint® 500 PTFE is non-abrasive to most mating materials which makes it a great replacement of aluminum seals to reduce clearance and improve efficiency. Fluorosint® 500 PTFE’s properties also make it ideal for use when reliable performance in hostile chemical environments is needed and in applications that require tight dimensional control. Fluorosint® 500 PTFE is available in the form of sheet or rod.


  • Split and one-piece seals
  • Valve seats
  • Shrouds
  • Slide bearings
  • Wear strips
  • Sacrificial, abradable seals
  • Thrust washers
  • Replacement for aluminum


  • Excellent chemical resistance
  • Increased wear resistance
  • Low friction properties
  • Lower coefficient of thermal expansion
  • High dimensional stability
  • Harder than PTFE
  • Non abrasive to most mating materials


PhysicalAstm Test MethodFluorosint® 500
Density (lb/in^3)D7920.084
Specific GravityD7922.32
Water Absorption @ 24 hours (%)D5700.1
Water Saturation (%)D5703
Tensile Strength (PSI)D6381,100
Tensile Modulus (PSI)D638300,000
Tensile Elongation at Break (%)D63810
Flexural Strength (PSI)D7902,200
Flexural Modulus (PSI)D790500,000
Shear Strength (PSI)D7322,100
Compressive Strength (PSI)D6954,000
Compressive Modulus (PSI)D695250,000
Deformation Under Load (% @ 2000 PSI @
122 ºF)
Izod Impact (Notched), ft-lb/inD256 Type “A”0.9
Rockwell HardnessD785R55
Shore D HardnessD2240D70
Coefficient of Friction (Dry vs Steel)
QTM 550070.15
PV (4:1 Safety Factor)
QTM 550078,000
Wear Factor “K” x 10^-10QTM 55007600
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648270
Melting Point, °FD3418621
Continous Service Temp (Operating), °F500
Thermal Conductivity, BTU-in/hr-ft² °FF4335.3
Flammability RatingUL94VO
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Surface Resistivity (ohms per square)EOS/ESD S 11.11>10^13
Dielectric Constant at 1 MHZD1502.85
Dissipation Factor at 1 MHZD1500.008

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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