Kapton tape is being used to hold Astronaut Piers Seller's safety-jet backpack latches in place when they make their next spacewalk on Wednesday. This tape is like duct tape but slippery and able to withstand both frigid cold and fiery hot temperatures. I'm way behind on this stuff, its been around 40 years apparently.

Somebody put it in layman's lingo: What is this stuff? Is it already in front of my nose under a different brand or name? Would this stuff have any place in a PSK or other survival applications? I assume it's too expensive to consider packing in a kit, am I wrong? I've not even seen the stuff, what's it like? I can't gleen much from Dupont's Kapton web site on it. Somebody educate me.