Originally Posted by
urbanknight
Yes, which was why I had asked that question before proceeding... because I wasn't sure if sealant would seal up punctures in the (usually latex) tubes very well. That makes sense that the Tufos would seal up more like tubeless, although I never liked the ride quality of those. The Rubinos
Aardwolf mentioned don't say which type of tube they use (the description is obviously recycled from their clincher tire, mentioning a folding bead), but I suspect they use butyl at that price point.
I get it. The difference between inner tubes sealing and tubeless/tubeless tubular tires sealing well, especially at high road pressures lies in the interface between the layer where the high pressure and ambient air air pressure happens. With a conventional inner tube, you have a very stretchy inner layer that is apart from the tire layer. So, if the inner tube is punctured, sealant has to repair a sketchy hole. If on the other hand, the air impervious layer of the inside of the tire is punctured, the air has to escape though a hole bounded by a very non stretchy hole. I mean, if that hole is big enough all bets are off, but the difference between a stretchy inner tube and a non stretchy tire carcass cannot be ignored