Our keystone selection includes this deco-style keystone. It can be applied to doors, entryways, windows, and more in both interior and exterior applications. The keystone is crafted in durable urethane, making it perfect for interior enhancements, but it also performs exceptionally well outdoors. The decorative keystone installs easily, and has a beautiful impact on your decor. Urethane molds with crisp detail and beautiful depth. This urethane keystone reveals the relief and versatility of urethane. Urethane, a non-porous material, resists the moisture absorbency that can cause warping, cracking, decay and peeling. The keystone is also pre-primed and ready for finishing and installation.