A sealing is short. The couple kneel facing one another across a small altar in a sealing room, a man holding the sealing authority pronounces the ordinance, and it is done. The room is small by design, holding perhaps thirty or forty people, and mirrors on opposing walls produce a receding reflection that Latter-day Saints commonly read as an image of the eternity the ordinance is about. The wording is fixed and the church holds it sacred, and the atlas does not reproduce it.
What distinguishes it from a wedding elsewhere is the claim being made. The church teaches that the marriage is for time and for all eternity rather than until death, and that children born to a sealed couple belong to that marriage permanently without any further act. Children born before a sealing, and adopted children, are sealed to their parents afterward in a separate ordinance. A person may be sealed to their parents, and to their spouse, and the resulting chain is understood to run back through the generations, which is what the movement means when it speaks of the welding link between the fathers and the children.
Only members holding a current temple recommend may be present, which makes the guest list at a temple wedding a matter of religious standing rather than of family closeness. That is the cost of the ordinance and it is a real one, felt most sharply by parents who cannot watch their own child marry.