James Hardie HardiePlank Smooth Fiber Cement Lap Siding has no woodgrain finish making it ideal for exteriors where a modern look is desired. Noncombustible cladding will not attract pests. Engineered to hold up to harsh weather conditions in the environment where it is installed. Factory primed using a primer with a slight yellow hue. To finish, apply an acrylic, water-based exterior house paint to the primed board within 180 days of installation.