How to fix a frayed cable on a MagSafe Power Adapter? Any idea how to fix the broken plastic/rubber covering of the cable on a MagSafe Power Adapter? Mine is showing the inner wires and I'm afraid of getting an electrical shock.
Sugru - not cheap, but very good.

Goes on like Plasticene/Silly Putty, dries like rubberised plastic. Flexible &amp; waterproof, lots of different colours.