Some say to use shrink wrap and others use Sugru or Instamorph.
Reddit about this stuff is at https://www.reddit.com/r/Massdrop/comments/1k2q3x/instamorph_a_much_cheaper_reusable_alternative_to/
I use a MacBook Pro laptop, and the covering on the 85W MagSafe 2 power adapter cord is dissolving, apparently from frequent contact with my fingers. It's completely gone near the magnetic plug, exposing about 2 inches of metallic sheathing. Is there a fix for this that might not disintegrate in the same way, and does it require giving up the computer while it's done? I prefer not to have to don surgical gloves while handling the power connector. I use no other devices whose power cords are so delicate.