Originally Posted by
SkyDog75
Electrical tape may work on a single-wall rim, but because it's so stretchy, it'll deform into the spoke holes of a double-wall rim, allowing the tube to push into those holes and potentially burst.
This is only a temporary solution, you do not want to put a lot of miles on the wheel before getting proper rim tape. Though I have used it on a mountain bike with dual wall rims and rode it for about a month before changing the rim tape and it was fine. The secret is to pull the tape so it goes on tight.
Ian