From clingwrapped:
I think using prestretched pallet wrap for a self bondage mummy might be problematic. The wrap is held in the stretched condition on the roll and slowly contracts a small amount, and the wrap I purchased is quite flimsy, like saran wrap. Using the technique to wrap a free standing object first, and then to self mummify by rotating about the object would expose the wrap to two opportunities to tighten: the free standing object would be nicely wrapped, but I doubt you could transfer a second time to yourself. Those that lay out a mat of wrap and then self roll on the mat would probably not have a good experience. I've not tried either as I am fortunate enough to have a cooperating partner
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One option that might work would be to use the prestretched wrap directly off the roll to wrap from chest to ankles and then use one of the other self mummification techniques with unstretched wrap, putting appropriate tension on the wrap as you roll. You wouldn't get the effect of total mummification with prestretched wrap but your legs will be nice and cozy.
I forgot to mention I'm using wrap that is 18 inches wide. That doesn't affect anything said above, but that's what my observations are based.
Another concern I had with the prestretch was whether punching a hole in the wrap would result in a run like in a stocking. It does not, and access to vitals doesn't ruin the wrap.