DAP Fast Dry High Strength Spackling now with DryDex dry time indicator is a professional-grade spackling compound uniquely formulated to provide strength and fast drying capabilities allowing some repairs to be painted in as little as 15 minutes. Its ready-to-use, smooth formula spreads easily and won't sink, shrink or crack, typically filling repairs in one coat. DAP Fast Dry High Strength Spackling is 3X stronger with superior impact resistance over traditional spackling compounds.