Originally Posted by
FBinNY
If you can rip off an old patch, it wasn't applied correctly. Done right, the patch to tube bond as as strong as the tube itself, and any attempt to rip the patch off is likely to tear the tube with it.
Agreed. I actually tried to rip off a patch on another tube where the air followed a channel formed by marking the hole with a Sharpie marker and not sanding it down enough. The patch and the tube were like a single material.