DAP Fast Dry Premium Spackling is a professional-grade spackling compound uniquely formulated to provide strength and fast drying capabilities allowing your repair to be painted in as little as 15 minutes. Its ready-to-use, smooth formula spreads easily and will not sink, shrink or crack, filling even the largest of drywall repairs in one coat. DAP Fast Dry Premium Spackling is 3X stronger with superior impact resistance over traditional heavyweight spackling compounds, lasts 2X longer and will not dry out like other competitive spackling compounds. Interior/Exterior.