Dap Alex Flex Premium Molding & Trim Acrylic Latex Sealant is specifically formulated for use on molding and trim applications. It delivers maximum adhesion and flexibility for a crack proof seal. High performance formula is ideal for natural and synthetic materials such as wood, MDF, PVC, polystyrene, and composite molding. It provides smooth and easy application and tooling, low odor, and easy 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, thereby saving time since the job is finished faster. 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. Cured sealant is mold and mildew resistant. 60 year durability. Exceeds ASTM Specification C920, Class 12.5. Interior/exterior use.