Tire porosity is something I just hadn’t realised until I got Schwalbe Pro Ones. My Conti GP5000TL don’t seem to be at all porous. The Schwalbes I’ve been running for a couple of months and there’s still tiny beads of sealant oozing through all over the place. Don’t seem to be losing pressure - similar loss rate to a butyl tube and certainly a lot less than latex tubes. Assume this is normal? Does it ever stop?