Just got my first set of tubless wheels/tires (Ibis 928, with Racing Ralphs snakeskin TL)
My understanding is that your options for fixing a flat on the trail are to add sealant, reinflate, and if that doesn't work to put a tube in.
Vittoria makes a product, Pitstop, which is both sealant and inflator in one, originally designed for Road tubulars.
I've used it with mixed success on tubulars, and less success on clinchers.
Wondering if anyone uses it on MTB tubeless?
It would definitely be quicker in a race, than removing the valve core, adding Stans, and reinflating, if it worked.