Silicone materials have excellent thermal stability in extreme low and high temperature environments. Silicones have good broad spectrum chemical resistance and are physiologically neutral making them ideal for many food, pharma, and medical applications. Not recommended for dynamic service or for contact with many fuels, mineral oils, or concentrated acids. Silicone can be formulated in a variety colors, durometer hardnesses and variations designed for use in a wide range of demanding specialty applications like medical and EMI shielding.
Service Temperature Range
Low Temp. Range, °F Abbv. High Temp. Range, °F Compr. Set Oils Steam Weather/
Fuels Acids/
Bases Abrasion Wear Permeation
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temperature range chart
  • Excellent
  • Moderate
  • Poor
  • Specialty Compounds Only


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Popular Allorings Compounds
Compound Relative
Low Temp ° F High Temp ° F Durometer Color Special
View Datasheet Relative Price: 2 Relative Availability: 5 -75  400  70  Orange 
Food and beverage grade compound. FDA compliant. 
Relative Price: 3 Relative Availability: 2 -75  400  50  Orange 
Softer hardness to seal rough or warped glands and or low closure force applications. 
Relative Price: 4 Relative Availability: 1 -65  500  70  Orange 
Improved high temperature resistance compound. 
View Datasheet Relative Price: 6 Relative Availability: 2 -65  400  70  Clear-Translucent 
Ultra clean compound for use in medical and pharmaceutical applications. Manufactured and packaged in a clean room. 
Relative Price: 4 Relative Availability: 2 -100  400  50  Orange 
Improved low temperature resistance compound. 
Relative Price: 4 Relative Availability: 2 -65  400  70  Clear-Translucent 
Medical and pharmaceutical grade compound. NOT manufactured or packaged in a clean room. For clean room MFG, see S1037. 
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Common Names:  Silicone, VMQ, PVMQ

Trade Name:  Silastic®, Elastosil®, Thermoflex®

General Description:

The term silicone covers a large group of materials in which vinyl-methyl-silicone (VMQ) is often the central ingredient. Silicones are excellent seal materials for extreme temperature in static applications. Outstanding flex and fatigue life, very good for ozone and UV radiation, insulating properties, and physiologically neutral.  Silicones can be synthesized with a wide variety of properties and compositions.


  • Can be compounded to meet FDA, USP Class VI, USDA, 3-A and Canada AG
  • Excellent heat and compression resistance, excellent flexibility, good electrical insulator
  • Excellent resistance to oxygen, ozone and sunlight, animal and vegetable oil and grease
  • Resistance to fungal and biological attack


  • Not recommended for dynamic application since it has low strength and poor abrasion resistance & high gas permeability
  • Concentrated solvents, oils, concentrated acids, diluted sodium hydroxide, hydrocarbon based fuels, aromatic mineral oil
  • Aromatic Hydrocarbons (benzene, toluene), aromatic mineral oil, acids and alkalis, Superheated water or steam over 250 F

Service Temperature:

  • -90 to 500° F (-68 to 260° C).  Depending on compound and application.