I had a IRD Crossfire tire mounted tubelss to a stans rim as a front wheel for two seasons. I replenished the sealant as needed, and finally the tire wore out, the sidewalls became too porous, and sealant would evaporate out leaving a constantly damp outer sidewall. So I removed the tire for retirement, but only after I flatted while coming down a rocky trail with some speed. I found that the sealant I'd put in 4 weeks prior had evaporated, so I put a tube in to finish my ride.
Upon removal, I found a membrane of sealant that I was able to peel out as a single piece! Now I have a giant latex rubberband as a result. BTW, I used three types of sealant over the course of the two seasons: mostly Stan's, but also Effeto Cafe Latex and Slime Pro.
Check out the pics attached.