This keystone is crafted in urethane and classic in design, featuring a versatile recessed panel design. The keystone interlocks with the MLD215 moulding profile. Like our urethane mouldings, decorative keystones install with ease, and they perform well, both inside the interior space and on the exterior. Decorative keystones are designed to easily meet your needs in a variety of ways, whether the desired effect is bold or subtle. High-density urethane is lightweight and easy to work with. It is non-porous and highly resistant to the effects of moisture. The urethane keystone maintains a traditional appearance while offering the high performance of this versatile modern polymer.