DAP Alex Flex Premium Molding & Trim Acrylic Latex Sealant is specifically formulated for use on molding and trim applications. It delivers excellent adhesion and flexibility for a crack proof seal. The high-performance formula is ideal for sealing natural and synthetic materials such wood, MDF, PVC, polystyrene and composite molding. It provides smooth and easy application and tooling, low odor, and water clean-up. In just 30 minutes, the sealant forms a tough outer skin that's dry enough to paint over with latex or oil-based paints, saving time. It provides a long-lasting, durable seal that will not shine through or discolor paint. Alex Flex is ideal for achieving a professional look with paint projects when sealing gaps around trim, crown molding, chair rails, baseboards, windows and doors. Exceeds ASTM Specification C920, Class 12.5. Interior/exterior use. DAP caulk and sealants provide durable performance for a variety of projects.