Polyurethane Decorative Round Arch Frame with Keystone

Introduce an elegant architectural transition to your interior or exterior spaces with this premium round arch frame. Designed to elevate standard doorways, hallways, and window heads, this decorative element brings classical symmetry and structural depth to any project. Its clean, stepped concentric profile acts as a sophisticated focal point, seamlessly bridging the gap between historical grandeur and modern minimalism.

Measuring 170x1750x971 mm, this arch is engineered from high-density rigid polymer with a density of 150-220 kg/m³. This advanced material delivers the structural hardness and crisp detail of traditional timber but without the associated weight or susceptibility to environmental degradation. Featuring a closed-cell structure with low water absorption (below 1%), it remains highly resistant to humidity, rot, or insect damage, maintaining its precise dimensional stability across temperatures ranging from -20 °C / +70 °C.

Visually, the design is defined by its smooth, sweeping curve that culminates in a prominent, block-style central keystone. This keystone breaks the continuous arc to create an authentic masonry aesthetic, casting elegant shadows that shift throughout the day. The entire piece is supplied with a factory-applied white base primer, providing an exceptionally smooth surface that is ready for high-quality finishing coats.

This versatile architectural framing element is ideal for interior passageways, luxury villa entryways, and master suite transitions. Externally, it serves as an imposing pediment above arched windows or main entrance gates. For any outdoor applications, coating the surface with a high-quality, UV-resistant exterior paint is mandatory to protect the material from long-term exposure to sunlight and ensure lasting color fidelity.

Compared to heavy, fragile plaster or concrete alternatives, this lightweight alternative is remarkably easy to handle and install. The mounting process involves preparing a clean, dry substrate, applying a continuous bead of polyurethane (PU) mounting adhesive to the back, and securing the unit mechanically with screws. After filling the screw holes and joints, a light sanding and two coats of paint will complete the seamless, professional installation.