butyl rubber Hear it!

butyl rubber definition

☆ butyl rubber

any of a group of synthetic rubbers that are basically copolymers of butylene and isoprene and that are especially impermeable to gases and resistant to abrasion, tearing, etc.

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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