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VMQ O-Rings

VMQ O-Rings, resistant to hot air, ozone and UV rays


VMQ O-Rings provide an excellent resistance to aging, oxygen, ozone, UV rays as well as a wide temperature range including a high flexibility into cold environment. VMQ is also a good electrical insulator and is highly gas permeable.

Because of their low mechanical properties, VMQ O-Rings are mainly used in static applications. In other words, their low tear resistance and high friction coefficient make them difficult to use in dynamic sealing applications.

VMQ-made O-Rings (Silicone rubber / Polysiloxane of Vynile-Methyle) are usually red-colored.

VMQ O-Rings availability

O-RingMaterialHardness [SH A]Temperature [ºC]Check stock availability
Junta tórica VMQVMQ20 – 80-60 to +160/+180

Properties and advantages

  VMQ O-rings have a good resistance to:
  • Engine oil and transmission oil
  • Animal and vegetable oils and greases
  • Brake fluid
  • Hydraulic fluid resistant to fire
  • Chlorinated aromatic hydrocarbons of high molecular weight (including flame retardant insulators and transformer refrigerant)
  • Diluted saline solutions
  • Ozone, ageing and weather
  • And they provide a moderate resistance to water as well
On the other hand, VMQ is not compliant with:
  • Silicone oils and greases
  • Aromatic mineral oils
  • Hot water and steam that overpasses 121 °C
  • Acids and alcalyse
  • Chlorinated hydrocarbons of low molecular weight (such as trichloroethylene)
  • Fuelsbased on hydrocarbons
  • Aromatic hydrocarbons (benzene, toluene)

About VMQ


The term silicone includes a large number of materials including VMQ (Vynil-Methyl-Silicone). Silicone elastomers have many remarkable properties among which a good resistance to heat and a high flexibility into cold environment. The also have a good resistance to ozone and ageing as well as excellent insulation properties.

VMQ O-RINGS in stock