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SILICONE and FLUOROCARBON

Silicone Rubber is a resilient rubber material that has a unique chemical structure that allows for high temperature stability and general inertness unavailable in most elastomeric materials. Silicone’s physical properties can withstand prolonged exposure to temperatures from -100 °F to +500 °F. Intermittently, silicone can withstand even higher temperatures. Silicone far outlasts other elastomers in resistance to thermal degradation and outperforms in general service life, compression set resistance, electrical strength and non-stick properties. Silicone also has good chemical and fluid resistance. Although it may swell in contact with some solvents, the rubber will return to its original dimensions, usually without permanent deterioration, after the solvent has evaporated. At elevated temperature, silicone will outgas far less than other rubber materials. If it should burn, it produces a non-conductive white ash and odorless, non-toxic smoke.

Silicone is odorless, tasteless and non-toxic. It contains no acid producing chemicals, thus is non-corrosive and non-staining. Silicone rubber has excellent weatherability because it is unaffected by sunlight, ozone and extremely moist or dry conditions. It will not support the growth of fungus.

Solid Silicone

Solid silicone materials are distinguished by a Durometer or hardness rating. Most common range is 30 Durometer through 70 Durometer measured on a Shore A scale. Solid silicone with tensile strength rating between 700 – 900 PSI meets ZZ-R-765 CL 2A, 2B, AMS 3301 – 3304 and ASTM-D-2000 testing specification. The higher tensile strength silicone which rates 1100 - 1200 PSI meets ZZ-R-765 CL 3B, AMS-3347 – 3349 and ASTM-D-2000 testing specification.

Silicone (Polysiloxane)

  • Temp: -100° F to +500° F
  • Good ozone, aging and weather resistance
  • Low out gassing for post-cured materials
  • Fungus resistant
  • Good compression set resistance.
  • Resistant to lubricants, animal and vegetable oils and alcohols
  • Moderate water resistance
  • Good dielectric strength
  • Not recommended for superheated steam (250°F), and solvents such as benzene, toluene, gasoline, and carbon tetrachloride
  • Low tensile strength, and poor tear and wear resistance

 

Fluorosilicone (FVMQ)

  • Temp: -100° F to +400° F
  • Mechanical and physical properties similar to silicone
  • Good ozone, aging and weather resistance
  • Resistance to fuels, mineral oils, benzene and toluene.
  • Low out gassing properties for post-cured materials.

Perfluoroelastomers (Teflon™*)

  • High purity
  • High temperature (600° F)
  • Broad chemical resistance
  • Excellent compression set resistance
  • Superior electrical properties
  • Flame resistance
  • Adhesion resistance (non-stick surface)
*Dupont Dow Elastomers LLC

Fluorocarbon (Viton®, FKM)

  • Temp: -15° F to +400° F/200° C
  • Both low and high temperature performance
  • Resistant to fluids and corrosive gases.
  • Excellent resistance to wide range of acids
  • Resistant to oxygen, synthetic hydraulic fluids, aggressive fuels, many organic solvents, and chemicals.
  • Low gas permeability, withstands high vacuum.
  • Very good weather, ozone and aging resistance.
  • Not recommended for use with superheated steam, ammonia gas, amines or alkalis.
  • Meets ASTM-D-2000

*DuPont Dow Elastomers LLC.