Product Description DAP DryDex Spackling provides a unique dry time color indicator that verifies when the patched surface is dry and ready to be sanded and painted. Provides a smoother finished surface in a shortened amount of time. DAP DryDex Spackling may be used to fill holes and cracks in surfaces such as drywall, plaster, wood, brick and stone. Its ready-to-use formula spreads easily for fast, professional repairs that will not crack, crumble or flake. DryDex dries hard, sands easily and is paintable. Interior/exterior use. From the Manufacturer Dap DryDex??? spackling contains a patent-pending Dry Time Indicator causing the product to change color when optimum dry time is achieved. It goes on pink and turns white! This unique feature is the signal that it is ready to sand and paint. Easy to use indoors and out on drywall, plaster, wood, and more.