Urethane safe drive-away is part of the replacement
The glass can look seated and still be unsafe to drive. The cartridge states the wait.
After a windshield is set, the car is ready when the urethane says it is ready. The bead has to hold the glass in a crash and keep the bond from letting go. A windshield that looks flush can still be a skin of urethane over a wet joint.
Many auto-glass urethanes quote a safe drive-away of thirty to sixty minutes at a moderate shop temperature. Cold glass, high humidity, or a fast-cure cartridge that was not the one on the spec sheet change that wait. The label on the tube is the number, and the temperature of the pinchweld is the condition.
Mobile jobs in a driveway run colder than a bay. A one-hour urethane in January is a different release than the same cartridge in July. The caller should hear the wait before the van rolls, so nobody is promised a ten-minute swap.
Resin jobs do not use this clock. A cured pit can leave when the lamp is done and the surface is polished. Mixing the two times is how a replacement gets sold as a half-hour stop.
Write the urethane's safe drive-away on the ticket in minutes, from the cartridge in the van, and keep the car until that time has passed.