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The only recommendation is to be reasonably confident your install isn't botched before you put sealant in - doing a dry run and observing how long it takes the tyre to flat is a good indicator. If the tyre goes flat in like 2 minutes or something then something is probably wrong. If it takes longer then you can be reasonably confident with a bit of sealant it will work properly. You don't need to leave them dry over night.
If you are using UST rims and tyres however they should not flat when set up dry...
Potential stupid question, is there some recommendation I'm missing that you're supposed to fit tyres without sealant overnight and then put sealant in the next day? It's just I've seen a few people talk about doing it and I wondered if it's thing you're supposed to do to stretch the bead out or something?