Ha, thanks for your input. I didn’t actually ask for a solution I asked if anyone else had suffered with similar problems 😉
I’ve installed 100’s of all types of ‘tubeless’ tyres since they were invented and also tested prototypes for Maxxis, so I have some experience on the matter and know the difference 😉
Whatever the type of tyre, UST, tubeless compatible or standard, call me pedantic, but I expect the carcass to be actually air tight, the sealant is there to help form a seal btw the bead and rim and hopefully fix punctures.
With my engineering head on, if the sidewalls are leaking, there are voids through it, which are weaknesses in the structure which can lead to premature failure.