White Lightning Weather Seal is a siliconized acrylic latex adhesive caulk that offers a weathertight/watertight seal for interior and exterior applications. The latex formula provides for easy application and easy water clean-up. Ideal for use on doors, windows and trim. Seals cracks between aluminum, metal, plastic, vinyl and wood. Good adhesion and durability. Good flexibility and elasticity-no cracking. Paintable. Cured caulk is mildew and rust resistant.