DAP(R) ALEX PLUS(R) all-purpose acrylic latex caulk plus silicone is an excellent quality, all-purpose caulk for sealing a wide variety of interior and exterior surfaces. It contains silicone additives for greater flexibility and adhesion and shrinks less for a durable, waterproof seal. ALEX PLUS(R) is paintable in just 30 min with latex or oil-based paints, saving time. It won't shine through or discolor paint finish for superior paint results. It is easy to apply and tool, low in odor and cleans up easily with water. Cured caulk is mold-and mildew-resistant.