Instead of teflon tape, you should try using self fusing silicone pipe tape. It can usually be found in the plubming section of most stores and at Walmarts.

It's somewhat similar in feeling to electrical tape, but without the adhesive, and much thicker. It actually has no adhesive, it only sticks to itself like saran wrap does. To use it you stretch it out then wrap it around an object and on top of itself. After a while, it fuses to itself like a cast and is like having coated the part in a rubber layer. The only way to get it off is to cut it, and it comes of cleanly

Not only is it waterproof and can withstand extreme temperatures, but it can be used in auto repairs to fix leaky hoses or to waterproof odd shaped objects. It can withstand quite a bit of pressure, a lot better than a duct tape repair.

This is what it looks like

http://www.cshyde.com/Silicone%20Self%20Fusing%20Tape.htm

Cost about $5 per roll.

EDIT: I misunderstood also, I thought you were carrying teflon tape to use as a tape. If you want to avoid the stickyness of duct tape, just wrap it in saran wrap.