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Encapsulated O-rings combine the qualities of PTFE with Viton® or Silicone Rubber. They have an outer jacket of PTFE-FEP protecting the resilient core from virtually all chemicals. The rubber core is totally encapsulated by PTFE-FEP and this unique combination enables encapsulated o-rings to give maximum protection against leaks in a wide range of sealing applications. PTFE has always been recognized as an indeal, chemically resistant, sealing material but it lacks elasticity. The Viton® or Silicone rubber core provides this missing element of memory, together with exceptionally good resistance to compression set, even at high temperatures.

Viton is a registered Trademark of DuPont Dow Elastomers