Which Caulking Is Best for Outdoor Vinyl Siding?

Acrylic latex caulk: This is the most common type of caulk used for outdoor vinyl siding. It is easy to apply, paintable, and flexible, making it suitable for caulking around seams, gaps, and joints in vinyl siding.

Polyurethane caulk: Known for its durability and flexibility, polyurethane caulk can withstand extreme weather conditions and temperature fluctuations. It forms a strong bond with vinyl siding, making it a reliable choice for areas that experience harsh climates.

Hybrid caulk: Hybrid caulks combine the properties of acrylic latex and polyurethane caulks, providing excellent adhesion, flexibility, and resistance to water and UV damage. They are often used in professional siding installations.

Silicone caulk: Silicone caulk is highly water-resistant and can be used in areas with high moisture, such as bathrooms or kitchens. However, it is more expensive than other caulk types and can be more difficult to apply.