Folks - Stan’s says it right on the bottle - only up to 45psi. In my experience, it actually seals around 30 and doesn’t hold the seal at all above that. Race and normal, same problem in both. I had a hole in a set of Gravelkings so tiny that I couldn’t fit the tip of a seal pick in it and Stan’s couldn’t handle it.
So far, I’ve had better luck with sealing above 50psi with Orange Endurance and Specialized 2Bliss. Neither of them give a “max psi” and both claim they are good for road tubeless.
I used to use Stan’s across my bikes because it was the easiest to find, but it just doesn’t work for road - or even for the more narrow gravel. If you want to ride about 45psi, don’t use Stans (and in their defense, it is the same information you’ll find on their bottles).