Keystone Window Trim

Keystone window trim is an elegant architectural exterior element featuring a decorative keystone motif at the apex of window and door frames, historically symbolizing the distribution of vertical loads. Widely used on exterior windows and main entrance doors, it accentuates classical architectural styles while adding sophisticated aesthetic depth to building facades. Compared to traditional concrete, heavy stone, or fragile EPS foam moldings, polyurethane keystone trim offers superior impact resistance and an exceptionally hard outer surface. Assess water and moisture exposure using the product technical data, surface finish and installation details. Include the product weight and fixing loads when assessing the substrate and supporting structure. Engineered with a high-density polyurethane formula, Polure's keystone window moldings deliver sharp lines, precise dimensions, and a flawless, smooth finish.