For 1 day drywall finishing. Asbestos-free powder compounds for interior gypsum panels and exterior gypsum ceiling boards when protected from direct exposure to the weather. Unique in humidity resistance, hardening rates are virtually unaffected by high humidity or changes in humidity. Exceptional bond with low shrinkage. Makes an ideal alternative in applications where faster finishing is required. Also used extensively on the job for patching and touch-up work. 25 lb. bag.