@MAREK_WIELICKI, Since Castable Wax does not require a post-curing step, the parts won’t experience any shrinking after printing. They can be used as-printed (and of course after washing).
@Hillzzz, to address your question about the shelf life of a printed part, Castable Wax prints are pretty robust! You can print a part, then cast it a few days or even weeks later.