Polyurethane Decorative Keystones and Window Accents

The P9003A model is a versatile decorative element designed to add aesthetic depth to both interior and exterior spaces. Serving as a keystone (arch keystone) above windows or as a complementary pediment accent on door headers, this product infuses facades with the timeless strength of classical architecture. Its clean, simple lines also make it a preferred minimalist detail in modern architectural projects.

Measuring 170x250x321 mm, this compact accent easily integrates into projects of various scales. Manufactured from high-density (150-220 kg/m³) rigid polyurethane, it offers a surface hardness comparable to wood while avoiding any unnecessary structural load on the building. Thanks to its closed-cell structure, its water absorption rate is below 1%, largely preventing rotting, swelling, or cracking even in humid climates.

Visually, the design features a downward-tapering trapezoidal body and an inset frame detail. This stepped surface design plays with natural and artificial light to create elegant shadows, adding three-dimensional movement to the facade. Compared to heavy concrete or fragile plaster alternatives, it is highly impact-resistant, virtually eliminating the risk of breakage or waste during installation.

While the P9003A model is widely used in exterior applications, it is important to note that unpainted polyurethane may yellow over time when exposed to sunlight; therefore, a UV-resistant paint is mandatory for outdoor installations. Indoors, it serves as an ideal decorative corbel or bracket to elevate the ambiance around fireplaces, ceiling cornice transitions, or wall panels.

The product is shipped from the factory pre-coated with a special primer to protect its surface quality. This primer facilitates better adhesion for the final coat of paint. However, since paint manufacturers do not guarantee applications done without their own system primers, applying an additional primer coat prior to installation is entirely at the customer's discretion. Polure does not assume liability for paint applications and subsequent performance.