how long does dap drywall joint compound take to dry
Drying Times. Joint compound should generally be allowed to dry for 24 hours between coats and before sanding, painting or priming. High humidity levels and warm temperatures both increase drying times, however.In a room that is 70 degrees Fahrenheit, for example, joint compound can take approximately 12 days to fully dry at 98 percent humidity.old weather also increases drying time, and joint compound should not be used at temperatures below 55 degrees Fahrenheit. Ideal conditions are temperatures between 65 and 80 degrees Fahrenheit with a humidity level between 20 percent and 40 percent.