Ace Seal is a global manufacturer of custom o-rings, seals, gaskets and other molded rubber & plastic components

Chemraz® O-Rings, Seals, and Gaskets

  • o-ring inside and outside measurement diagram


Chemraz® O-ring Products Include:


As a high-performance perfluoroelastomer (polymers with 3 or more monomers where all hydrogen positions have been replaced with fluorine), Green Tweed’s Chemraz® is designed and manufactured to provide exceptional chemical resistance. With a broad chemical resistance, Chemraz® o-rings, seals, and gaskets applies to an extensive range of application uses. 

FFKM Chemraz® O-Ring Chemical Compound Characteristics

While its chemical resistance remains unparalleled and one of the primary reasons for its dominance as a versatile o-ring material, Chemraz® also provides excellent sealing capabilities. Specific Chemraz® physical properties include:


Chemraz ®Compounds Available from Ace Seal

Temperature Range


 Application Uses

Chemraz® 504


-22°F to 446°F

  • Broad chemical compatibility
  • Low compression set/low temp capabilities
  • Controls
  • Couplings
  • Mechanical Seals
  • Valves

Chemraz® 513


-22°F to 410°F

  • Offers plasma resistance
  • Ideal for semiconductor applications
  • Door Seals
  • Gas Seals
  • Lid Seals
  • Window Seals

Chemraz® 550


-22°F to 410°F

  • Suitable for where small amounts of contamination are acceptable
  • Can be used in dynamic or static applications
  • Filter Seals
  • Gaskets
  • Regulator Seals
  • Valve Seals

Chemraz® 629


-4°F to 500°F

  • Offers plasma resistance to oxygen and fluorine applications
  • High elasticity allows for easy seal installation
  • Chamber Seals
  • Jar Seals
  • Valve Seals
  • Window Seals

Chemraz® 653


0°F to 615°F

  • Exceptional compression set and plasma resistance
  • Black, Carbon-loaded material
  • Bell Jar Seals
  • High-Temp Valve Seals
  • KF Fitting Seals
  • Quartz Rod Seals


Chemraz® E38


-4°F to 500°F

  • Can withstand various aggressive chemicals
  • Developed for plasma systems and diffusion processes
  • Chamber Seals
  • Bonded Gate Seals

Chemraz® Seal and Gasket Benefits

From pharmaceutical and lab instruments to bio-processing and power generation applications, Chemraz® seals and gaskets offer superior compression and broad chemical resistance not found in other FFKM materials. Additional Chemraz® advantages include:

  • High sealing capabilities regardless of temperature or environmental harshness
  • Available in standard shapes as well as custom, design/application specific shapes
  • Less costly than comparable FFKM materials like Kalrez®
  • Capable of being molded into various application-specific o-ring shapes and thicknesses

Order Your Wholesale Chemraz® O-Rings, Gaskets, and Seals

As a global supplier of high-performance o-rings and custom molded components, Ace Seal has the Chemraz® expertise you need for all your Chemraz® component needs. Our extensive work with a wide variety of industries reflects our knowledge and o-ring, seal, and gasket manufacturing capabilities.


Order your Chemraz® seals and gaskets today or contact us to discuss your application requirements.