Exterior Keystone

A keystone is a decorative accessory representing the locking element located at the top center point of arched structures that holds the arch together in traditional architecture. In today's modern polyurethane decorations (such as P8021A), keystones are used to complete aesthetic integrity and create a focal point. Keystones, available in different sizes and figure options, add character to window and door arches. Since polyurethane keystones are very light, they do not put extra load on the arch and provide a single-piece stonemasonry appearance by integrating perfectly with the facade paint after assembly.