How long does it take for drywall to dry?
The drying time depends on the type of mud used as well as the thickness applied. All-purpose usually dries in 24 hours. Quick-set mud dries from 5-90 minutes (5 min mud, 20 min mud, 45 min mud, 90 min mud). Topping dries in about 16 hours and taping dries in about 24 hours. Skim coats dry fast (typically within 10-20 minutes).
Thin applications take less time than thick applications, which can take up to 24 hours.