Originally Posted by
RubeRad
Park claims they addressed this
https://www.parktool.com/en-us/produ...patch-kit-gp-2
All the glueless kits I see still come with sandpaper to roughen the surface of the tube. Does that possibly mean that the glueless patches are pre-glued with vulcanizing glue? Or just that the unroughened surface is just plain no good for adhesion
Whatever type of patch, you want to remove the "dead" oxidized rubber and get down to the good stuff.
Think of gluing to a rusty surface.
My response to glueless patches is they got me home, but tended to loosen when blowing up the tube to find subsequent leaks.
Remove the air from the tube of glue by squeezing a small glob of glue (waste a glob, save the remainder of the tube) out before putting the cap back on.
I've got a tube that was opened about 6-7 years ago that was still good last June.