But why even bother with "glueless" patches? A vulcanizing patch (e.g. Rema) will take just a couple of minutes longer than a glueless patch to install (i.e. the time to smear on the cement and wait for it to dry). You're already investing several minutes in demounting the tire, pulling the tube, reinstalling, checking for pinches, and pumping it back up again. Why not add a minute to have a permanent repair rather than an unreliable one that will require redoing when you get home. There's simply no up side to using "glueless".