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Elastomer Materials


“Materials” are the foundation of our technology. Every day, people deal with products that possess seals and they generally know very little about the materials with which they are made. For example, plastic is a comparatively new material and has long been considered to be a “wonder substance”. But why is plastic so flexible and how are the various mixtures differentiated from one another? When is a silicone seal better than one made of polyurethane or rubber?

SIMRIZ® – Long-Lasting, High-Performance FFKM Seals

FFKM - Structural Formula

Designed for thermal stability and nearly universal protection against the chemical elements, Freudenberg Sealing Technologies’ proprietary family of Simriz® Perfluoroelastomer compounds offer outstanding sealing performance.

Simriz® stands out with its broad chemical stability, like PTFE, combined with the rubbery-elastic qualities of an elastomer. Simriz® FFKM’s are used wherever extreme safety standards apply and high maintenance as well as repair expenditures exceed the costs of the seals. Freudenberg is vertically integrated back to the monomers to provide unparalleled material performance, cost competitiveness and speed of delivery. In addition, many popular compounds and AS568 sizes are in stock.

Simriz´O-Ring Family

Benefits for Freudenberg Sealing Technologies customers:

  • Without equal – patented cross-linking system provides superior performance beyond the limits of other competitor FFKM products.
  • Vertical integration – Freudenberg is the only vertically integrated O-ring manufacturer.
  • Cost-efficient – as the only vertically integrated O-ring manufacturer down to the monomers, Freudenberg can provide the most cost-efficient FFKM O-rings.

Superior Thermal and Chemical Resistance:

Simriz® perfluoroelastomer compounds are designed for a variety of industrial applications, including chemical processing and other heavy industries. Custom molded shapes are also available.

Let Freudenberg advise you on either a cost-effective solution for your application or a single material that can handle all your needs, utilizing Freudenberg’s proprietary curing system.

Find your Simriz® solution here

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