Maybe you are already using Wonder Tape and know just how wonderful it is, but if not let me tell you about it because this double sided sewing tape because it will make your sewing life easier.
I first picked up a roll of this tape to use to install an invisible zipper. Invisible zippers aren't something I have a lot of experience sewing, but using this tape made it super easy and my zipper turned out perfect! Now this tape is my go to thing when sewing zippers.
When using it for zippers, I use just a few small pieces--one at each end and one in the middle. The roll is 10-yards, but if you sew a lot of zippers you'll probably want to conserve the tape.
If you are new to sewing or haven't sewn a zipper before, skip conservation and tape the entire length of the zipper to really hold it in place firmly.
Wonder Tape won't gum up your needle and though it does wash away, it also doesn't have to be removed. If you put it on next to the very edge of the zipper tape it will be hidden after you sew on the zipper.
The other place I use this tape regularly is for VELCRO. Before using this tape my VELCRO almost always ended up slightly off kilter no matter how hard I tried to keep it straight! So it's nice to not be looking at crooked VELCRO anymore.
P.S. Check out what other people had to say about this tape here.