Positive Bond on Contact Unlimited Shelf Life No Damage to Interior Trim Butyl Rubber Tape has been developed for the installer to meet his specific needs. It is easily compressible and tacky, but won't flow out of the pinch weld. It's the one tape that gives you the support, sealing and strength you need for leak-proof installations and no call-backs. Controlled rebound allows proper molding fit. Butyl Rubber Tape has been proven to be one of the finest tapes on the market.