Tubs

FWIW I put sealant in my Gators, as the mesh/vectran layer holds them together and means that any puncture is only a pin-prick in the tube, which Revo seems to tackle well.

I don't put sealant in my Ultremo's, because RaceBiek, I carry a spare (full-size) pre-glued Ultremo though.

The Veloflex Roubaix are lovely tyres, and I have two "fixed" with sealant, but I'd probably NOT seal them in future, rather I'd change them at the roadside as soon as they puncture.

Sensible. I only have Sprinters which seem quite durable, but even so my thinking is I'll only try sealant as a final, get me home at all costs, fix. I always carry a spare unless I'm doing a local training ride.

It's interesting what a different animal the CAAD9 is with tubulars at sensible pressures compared to the GP4000 clinchers I ran over the winter. Much grip & comfort. 200km on a K:1 saddle not an issue etc.