Fluorinated Sealing Materials from Freudenberg Sealing Technologies

O-Ring FKM - Freudenberg Sealing Technologies offers a diverse range of FKM materials, designed to perform reliably in extreme temperatures – both high and low – while also resisting aggressive chemicals.

O-Ring FKM - Freudenberg Sealing Technologies offers a diverse range of FKM materials, designed to perform reliably in extreme temperatures – both high and low – while also resisting aggressive chemicals.

Published: 3rd October 2025 | Issue 101 Share article:

Author: Dr. Robert Rotzoll, Freudenberg Sealing Technologies

As a leading specialist in sealing solutions for the chemical industry, Freudenberg Sealing Technologies provides an extensive range of fluorinated materials. This ensures reliable sealing performance across virtually all applications. 

High-performance FKM materials for chemical applications

Fluoroelastomers (FKM) offer outstanding chemical and thermal resistance compared to other standard rubbers. They are able to handle acids, lyes, hot water, steam, and various solvents. 

Freudenberg Sealing Technologies provides FKM materials capable of withstanding extreme temperatures from -40°C to +230°C (in air), while also resisting chemicals, weathering, aging, oxygen, and ozone. For enhanced resistance to hot steam or lyes, the Fluoroprene® XP material family offers a specialized solution. In the chemical industry, challenges such as rapid gas decompression and aggressive media demand high-performance elastomer seals. 

Freudenberg Sealing Technologies’ FKM portfolio addresses these needs with tailored material technology. Besides O-rings, other special sealing solutions or diaphragms can be considered upon request.

Radial Shaft Seal PTFE - Radial shaft seals made of high-quality PTFE are essential components in the chemical industry, alongside many other specialized products.

Radial Shaft Seal PTFE - Radial shaft seals made of high-quality PTFE are essential components in the chemical industry, alongside many other specialized products.

Premium PTFE materials for sealing chemical applications

PTFE is a unique high-performance plastic widely used in chemical applications. Compared to rubber materials, PTFE has a superior media resistance, excellent sliding properties, and low friction coefficient (no stick-slip effect). It also offers outstanding ozone and weathering resistance, very good extrusion strength, and a broad temperature range, while being flame-resistant. Unlike elastomers, PTFE lacks rubbery-elastic properties, but its properties can be enhanced through tailored molecular structures and additives as well as in combination with rubber energizers. 

Freudenberg Sealing Technologies provides various PTFE solutions for piston seals, rod seals, radial shaft seals, chevron seals, and u-cups. Some serve as all-rounders, while others excel in extrusion resistance or perform reliably even without lubrication. 

New fluorosurfactant-free FKM materials

High-performance FKM materials are essential for demanding applications across various industries, often without viable PFAS-free alternatives. FKM grades produced through cleaner production processes are now becoming available at Freudenberg Sealing Technologies. These new safer materials maintain the same high-performance standards as existing FKM grades. 

Customized sealing solutions for individual applications

With Freudenberg Sealing Technologies chemical plants can be reliably sealed. Thanks to the wide portfolio of fluorinated sealing materials like FKM, FFKM and PTFE, there is always a solution available that withstands the very harsh conditions. Contact our experts for a detailed technical consultation. 

Contact Details:

Scott Wilson

Scott.wilson@fst.com

+44 (0) 1332 524400

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