Rubber Fab Tuf-Flex®

Rubber Fab’s Tuf-Flex® sanitary gasket is the world’s only unitized gasket, and is setting new standards for purity, performance and flexibility. Tuf-Flex® is specifically designed to meet critical requirements in pharmaceutical, biotechnology, ultrapure water, WFI (water-for-injection).

Because Tuf-Flex® will not impart taste or odor, Tuf-Flex® is your ideal gasket for the Food & Beverage Industry!

Tuf-Flex® Temperature Rating
-20°F to 300°F

  • Effective seal
  • Patented welding process produces large gaskets without dovetailed joints that permit leakage
  • GYLON® material provides excellent chemical resistance of PTFE without creep relaxation and cold flow problems
  • Versatile
  • Available in cut gasket form only
  • Styles 3500, 3504, and 3510 can be welded using this unique process
  • Ideal for corrosive applications with extra large flanges
Rubber Fab Tuf-Flex®

Tuf-Flex® Gasket Comparison

Rubber Fab Tuf-Flex®
Type I


A Solid PTFE Type I Gasket is guaranteed to fail in SIP conditions. They will creep, cold flow and leak at delta T.

Rubber Fab Tuf-Flex®
Type III Envelope


The Envelope Gasket construction provides inconsistent results between the two materials. It will also creep, cold flow and leak over time.

Rubber Fab Tuf-Flex®


The PTFE grafted elastomer in a Tuf-Flex sanitary gasket will maintain I.D. without re-torquing or leaking.

Rubber Fab Tuf-Flex®
Available in IDF:
(International Dairy Fitting)
Rubber Fab Tuf-Flex®
Available in Metric Sizes:
ISO 1127
Size DN08, DN10, DN15

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Rubber Fab Tuf-Flex®

Technical Resources