Caulk is a material utilized to seal seams or joints in structures that contain leakage. When picking caulks to be used on exterior siding, it’s important to select the appropriate materials and colors for the house being worked on. Silicone based sealants are water and weather resistant, making them the best option for siding application. Choose from high-quality products designed to seal siding, doors, windows, and trim. Select options are designed to bond wood, steel, aluminum, brass, some plastics, and more. A huge range of colors are available including paintable options for maximum customization. Select products qualify for a bulk order discount.