DAP(R) Alex Fast Dry(R) Acrylic Latex Caulk Plus Silicone is specifically formulated to meet the demanding needs of professional painters and deliver outstanding paint finish results. It can be brush painted in 20 minutes after application or spray painted immediately, so the job gets finished faster. This durable, flexible caulk wont crack or discolor paint and does not pick up dirt. It has outstanding adhesion to a wide variety of surfaces, provides a 100% waterproof seal and cured caulk is mold and mildew resistant. It applies smoothly and easily. Backed by a 50-year warranty on crack resistance. Exceeds ASTM Specification C834. This caulk is designed for interior and exterior uses.