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Kalrez® FFKM Manway Gaskets & Handway Gaskets

Kalrez® FFKM manway gaskets and handway gaskets are engineered for large access port sealing in chemical processing equipment where extreme chemical resistance, high temperature capability, and long-term reliability are critical. These perfluoroelastomer gaskets are used in reactors, vessels, and storage tanks to seal manways and handways that must withstand aggressive chemicals, pressure cycling, and thermal expansion. Kalrez® FFKM materials maintain sealing performance in harsh process environments where standard elastomers and many gasket materials degrade or fail, making them ideal for O-rings, gaskets, and custom parts used in critical containment systems.


Canyon Components supplies Kalrez® FFKM manway and handway gaskets alongside Canrez® perfluoroelastomer alternatives, offering a competitively priced solution with fast lead times and extremely high quality. Our team supports custom gasket design, large diameter manufacturing, and sealing surface optimization to ensure proper compression, fit, and long-term sealing performance in demanding chemical processing applications.


Common names include: FFKM manway gaskets, perfluoroelastomer gaskets, chemical resistant access gaskets

Trade names include: Kalrez®, Canrez®, Chemraz®, Parofluor®

FFKM O-rings from Canyon Components providing excellent chemical, heat, and compression resistance in critical sealing applications.

FFKM O-rings from Canyon Components providing excellent chemical, heat, and compression resistance in critical sealing applications.

Other FFKM Offerings - Canrez®

The Canrez® range of perfluoroelastomer (FFKM) materials, O-rings, gaskets, & custom molded parts are at the leading edge of polymer technology. Proven in the field year after year, Canrez® materials, O-rings, gaskets, & custom molded parts have been developed to offer superior sealing solutions with enhanced high temperature performance and fantastic chemical resistance at an extremely competitive price! Canrez materials are comparable, and sometimes superior to Kalrez®.

Canrez FFKM O-rings from Canyon Components, a Kalrez equivalent, offer exceptional chemical resistance and high-temperature sealing for semiconductor, pharmaceutical, and chemical processing industries.

Canrez FFKM O-rings from Canyon Components, a Kalrez equivalent, offer exceptional chemical resistance and high-temperature sealing for semiconductor, pharmaceutical, and chemical processing industries.

Learn more about CanRez™

Learn more about CanRez™

Kalrez® FFKM Materials Available

This table shows many of our standard materials and links out to our O-ring store. Get in touch with us if you need a custom gasket, custom molded part, or non-standard geometry!

Canyon Components stocks Kalrez O-rings in AS568, JIS, and Metric sizes with custom molded FFKM part options.

Canyon Components stocks Kalrez O-rings in AS568, JIS, and Metric sizes with custom molded FFKM part options.

Features of Kalrez® FFKM Manway and Handway Gaskets



  • Kalrez® FFKM gaskets offer excellent compression set resistance, supporting long-term sealing across large flange surfaces


  • These gaskets are available in large diameters and custom profiles to match vessel and access port requirements


  • Kalrez® FFKM materials provide low permeability and stable performance in demanding chemical environments


Limitations of Kalrez® FFKM Manway and Handway Gaskets


  • Lead times may be longer due to large diameter and custom manufacturing requirements


  • Low temperature flexibility is limited compared to silicone or EPDM gasket materials


  • Mechanical handling and installation of large gaskets require careful alignment and compression control


  • Over-specifying FFKM gaskets for moderate chemical environments can increase cost without added performance benefit

Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.

Industrial Usage of Kalrez® FFKM Manway Gaskets and Handway Gaskets for Chemical Processing

Kalrez® FFKM manway and handway gaskets are used in chemical processing applications where sealing large access points requires resistance to aggressive chemicals, high temperatures, and pressure cycling. These gaskets are critical for maintaining containment in reactors, vessels, and storage systems where leakage cannot be tolerated. Selecting the right Kalrez® FFKM or Canrez® gasket solution depends on chemical exposure, temperature range, flange design, and compression requirements.


Canyon Components provides engineering support to assist with gasket design, material selection, and sealing performance optimization. Our team can help evaluate application requirements and provide supporting documentation including Datasheets, TDS, Test Reports, MTR documentation, and MSDS or SDS resources to ensure reliable sealing performance.

Chemical Processing

Kalrez® FFKM manway and handway gaskets are used in reactors, vessels, and storage tanks exposed to aggressive chemicals and high temperatures

Oil and Gas Industry

FFKM gaskets are used in large access sealing applications where hydrocarbons and elevated temperatures are present

Pharmaceutical and Specialty Chemical Systems

Kalrez® FFKM gaskets are used in systems requiring high purity sealing and resistance to cleaning chemicals

High Temperature Industrial Systems

FFKM gaskets are used in applications involving thermal cycling and high process temperatures

Containment and Safety Applications

Kalrez® FFKM gaskets provide reliable sealing for critical containment systems where leak prevention is essential

Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.

All Other FFKM Types Available

Canrez® FFKM O-Rings & Custom Parts
Canrez® FFKM O-Rings & Custom Parts

Canyon Components supplies Canrez® FFKM O-rings, equivalent to Kalrez®, Chemraz®, and Parker® O-rings, in AS568, JIS, and Metric sizes. These perfluoroelastomer O-rings provide exceptional chemical resistance, high-temperature stability, and long-term sealing performance for semiconductor, pharmaceutical, and chemical processing applications. Custom molded Canrez® parts available.

Kalrez® vs Canrez®: Comparing FFKM Sealing Solutions"
Kalrez® vs Canrez®: Comparing FFKM Sealing Solutions"

Compare Kalrez® vs Canrez® FFKM for O-rings, gaskets, and custom parts. Learn the differences in performance, availability, and cost to choose the best perfluoroelastomer for your application.

Kalrez FFKM O-Rings, Gaskets & Custom Parts
Kalrez FFKM O-Rings, Gaskets & Custom Parts

Canyon Components supplies genuine Kalrez® FFKM O-rings, gaskets, and custom molded parts with exceptional chemical resistance and high-temperature performance. Available in AS568, Metric, and custom sizes, with Canrez®, Chemraz®, and Parker® O-ring equivalents for semiconductor, pharmaceutical, aerospace, and chemical processing applications.

Parker Hannifin Parofluor FFKM O-Rings, Gaskets & Custom Parts
Parker Hannifin Parofluor FFKM O-Rings, Gaskets & Custom Parts

Canyon Components supplies genuine Parker Hannifin Parofluor FFKM materials for extreme chemical resistance and high temperature sealing. Compare Parofluor with Canrez® FFKM for O-rings, gaskets, and custom parts in demanding applications.

Chemraz FFKM O-Rings, Gaskets & Custom Parts
Chemraz FFKM O-Rings, Gaskets & Custom Parts

Canyon Components supplies Chemraz® FFKM O-rings engineered for the most demanding sealing applications. Known for extreme chemical resistance and high-temperature stability, Chemraz® O-rings provide reliable sealing in semiconductor, pharmaceutical, aerospace, and chemical processing environments. Alternatives include Kalrez®, Canrez®, and Parker® FFKM O-rings in AS568, Metric, and custom sizes.

Simriz® FFKM from Freudenberg: O-Rings, Gaskets, and Custom Parts
Simriz® FFKM from Freudenberg: O-Rings, Gaskets, and Custom Parts

Canyon Components is a distributor of Simriz® FFKM O-rings designed for extreme chemical resistance and high temperature applications. Compare Simriz® with Canrez® FFKM for O-rings, gaskets, and custom parts in demanding sealing environments.

Back to Elastomers Hub

Unlock Superior Performance with Canrez FFKM O-Rings - Explore High-Quality Sealing Solutions for Demanding Industrial Applications. Ensure High Chemical Resistance, Extreme Temperatures & Leak-Free Seals. Your Trusted Source for Canrez FFKM O-Rings.

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These products may be covered by existing or pending patents. Canyon Components is not liable for the accuracy, currency, or completeness of information herein. All information is subject to change without notice. All trademarks and service marks are the property of their respective owners. Made withgu.dev, Icons by Icons8

* Disclaimer: Kalrez® is a registered trademark of DuPont™. It represents a high-performance perfluoroelastomer used in demanding sealing applications. Please note that the Kalrez® brand is not owned by Canyon Components. All rights and ownership of the Kalrez® trademark are held by DuPont™, ensuring the quality and reliability associated with this renowned brand.