ready mix compound is pre mixed
powdered compound sets up by time not temperature
Choose a Compound Type
There are two basic kinds of drywall compound; powdered and ready-mix.
Ready-mix compound (Image 1) is pre-mixed and only needs to be stirred with a paddle to use. It must only be used in a 55 degree or higher climate so that it will dry properly. Apply bullets
Powered compound (Image 2) sets-up in a specific amount of time, rather than by temperature. It's available in various drying times.