DAP ALEX Fast Dry Acrylic Latex Caulk Plus Silicone is ideal for projects that require painting shortly after caulk application. In about 40 minutes, the caulk forms a tough outer skin that's dry enough to paint over with latex or oil-based paints, cutting standard waiting times by 80 minutes. (Allow additional dry time in high humidity or cool temperatures.) This durable indoor and outdoor caulking product provides a waterproof, resilient seal designed to prevent air and moisture from passing through cracks and joints to help improve energy efficiency. Plus, it provides excellent flexibility to resist expansion and contraction without cracking. Easy to use, low in odour and VOC compliant, ALEX Fast Dry is ideal for windows, doors, and trim, and the latex based formula means easy water clean-up.