Originally Posted by
carpediemracing
The only way to properly fix a flatted tubular, as long as the casing is okay, is to replace the whole tube.
I fix my own by opening up the casing and patching the whole then sew the casing shut. Been doing it for many many years this way and it works like a charm.
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I've had reasonably good experience with Cafe Laytex but mostly just for very small holes but it can save you the trouble of taking off the tire and opening the casing to find the hole to patch it.