DAP Alex Fast Dry 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. Durable, flexible, white caulk won't crack or discolor paint and doesn't pick up dirt. It has outstanding adhesion to a wide variety of surfaces and provides a 100% waterproof seal. It applies smoothly and easily. Cured caulk is mold and mildew resistant. Exceeds ASTM Specification C834. Interior/exterior use.