Keystone Arch Molding

Keystone arch molding is a decorative exterior trim element featuring a central keystone motif, designed to crown arched windows and doorways. It is widely used around exterior window frames, above main entrance doors, and over curved wall openings to create architectural harmony. Compared to traditional concrete or stone alternatives, polyurethane keystone arches are exceptionally lightweight and do not add static load to the building structure. They prevent thermal bridging and offer high resistance to moisture, water, UV rays, and impacts. Free from common issues like cracking, peeling, or blistering, they can be quickly installed thanks to their flexible application and painted in any desired color. Polure manufactures high-density, smooth-finished keystone arch moldings fully compatible with harsh outdoor conditions.