Here's something I just learned the hard way. TPU patches need to be stuck down as soon as you have applied the glue to the tube, before the glue dries.
Unlike patching a traditional butyl tube, where you must wait for the glue to dry first.
Reading the instructions in the RideNow patch kit makes this difference clear, but who reads patch kit instructions? Not your humble servant.
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Ride, Rest, Repeat. ROUVY:
terrymorse