DAP Alex Plus Acrylic Latex Caulk Plus Silicone is an excellent quality, painters caulk for sealing a wide variety of interior and exterior surfaces. White caulk contains silicone additives for greater flexibility and adhesion and less shrink for a durable, waterproof seal. Perfect for use on trim, baseboards, windows, door frames, molding, vents and more. Alex Plus is paintable in 30 minutes with latex or oil-based paints, saving time. It won't shine through or discolor the paint for superior paint finish results. It is easy to apply and tool, low in odor and cleans up easily with water. Exceeds ASTM C834. Interior/exterior use.