Please consult Seals Unlimited for material choices not listed. Unique properties that can be added to the rubber compound are extra antidegradents, biocides, and blooming lubricants to name a few. The physicals of the rubber can also be adjusted to meet your specialized needs. Use our fax at 503-690-6688 to send us your drawing, rubber specifications and rubber service requirements for a prompt quote. ®· Hypalon and Viton are registered trademarks of Dupont Dow Elastomers ®· · Aflas is a registered trademark of the 3M Corporation