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


Astm Test Method

Fluorosint® 500

Density (lb/in^3) D792 0.084
Specific Gravity D792 2.32
Water Absorption @ 24 hours (%) D570 0.1
Water Saturation (%) D570 3


Tensile Strength (PSI) D638 1,100
Tensile Modulus (PSI) D638 300,000
Tensile Elongation at Break (%) D638 10
Flexural Strength (PSI) D790 2,200
Flexural Modulus (PSI) D790 500,000
Shear Strength (PSI) D732 2,100
Compressive Strength (PSI) D695 4,000
Compressive Modulus (PSI) D695 250,000
Deformation Under Load (% @ 2000 PSI @
122 ºF)
Izod Impact (Notched), ft-lb/in D256 Type “A” 0.9
Rockwell Hardness D785 R55
Shore D Hardness D2240 D70
Coefficient of Friction (Dry vs Steel)
QTM 55007 0.15
PV (4:1 Safety Factor)
QTM 55007 8,000
Wear Factor “K” x 10^-10 QTM 55007 600


Coefficient of Thermal Expansion,
D696 2.5
Heat Deflection Temperature 264 psi, ºF D648 270
Melting Point, °F D3418 621
Continous Service Temp (Operating), °F 500
Thermal Conductivity, BTU-in/hr-ft² °F F433 5.3
Flammability Rating UL94 VO


Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 275
Surface Resistivity (ohms per square) EOS/ESD S 11.11 >10^13
Dielectric Constant at 1 MHZ D150 2.85
Dissipation Factor at 1 MHZ D150 0.008


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.