




































Polyurethane Decorative Keystones and Window Accents
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Classic motif, relief-worked decorative surface |
| Color | White |
| Density | 150-220 kg/m³ |
| Water Absorption | below 1% |
| Service Temperature | -100 °C / +80 °C |
| Fire Class | B2 (flame retardant) |
| Paintable | Yes |
| Usage | Indoor + Outdoor |
| Water Resistant | Yes |
| Dimensions | 170 × 250 × 321 mm |
| Weight | 0.63 kg |
| Sales Unit | piece |
Details
Support
- DWG Library
- Polyurethane Exterior Trim Ornaments: Sizing & Installation
- Polyurethane Window Jamb Sizing and Exterior Mounting Guide
- Gallery
- Polyurethane Round Arch and Transition Decor
- Polyurethane Round Arch Window and Door Pediment Model
- Polyurethane Round Arch and Door Top Curve Models
- Polyurethane Round Arch Model with Keystone
- Polyurethane Curved Arch with Keystone Model
- Polyurethane Round Curved Arch with Keystone
- Polyurethane Classic Window Pediments and Trims
- Polyurethane Decorative Lintel Ornament and Keystone Model
- Classic Polyurethane Decorative Corbel and Keystone Model
- Contact
Polyurethane curved arches designed to match the P9003A decorative trim
Create a cohesive architectural look by pairing these curved arch profiles with the P9003A decorative molding. Ideal for elegant interior and exterior framing projects.




















Polyurethane curved arches designed to match the P9003A decorative molding trim
Enhance your architectural designs with these matching curved arches, perfectly coordinated with the P9003A decorative molding. These durable polyurethane elements ensure a seamless, cohesive look for premium interior and exterior projects.














Frequently Used Together
Similar Products(Window Surround Ornament)
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%, completely 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.
- The P9003A trapezoidal window accent offers a wide range of applications
- In exterior designs, it is primarily placed at the top center of window frames to serve as a decorative keystone
- It can also be positioned beneath cornices or eaves as a decorative bracket or corbel on villas, hotels, and residential facades
- For interior decoration, it is ideal as a crowning detail on door frames, a side support on classic fireplace mantels, or an aesthetic corbel beneath decorative wall shelving
- With the right painting techniques, it blends seamlessly into both classical and modern neo-classical architectural concepts
- The application surface must be completely free of dust, dirt, and moisture
- Apply Polure Polfix polyurethane adhesive, which provides a strong bond, to the back of the product (standard silicone adhesives must not be used for installation)
- Once the adhesive is applied, place the product on the wall and secure it mechanically with screws
- Cover screw heads and joints with an exterior-grade acrylic filler
- After the filler dries, sand with 180-220 grit sandpaper to achieve a smooth finish
- Optionally, apply an additional coat of primer, then complete the installation by applying at least two coats of UV-resistant paint for exteriors, or water-based/synthetic paint for interiors
- Thanks to the closed-cell structure of polyurethane, maintenance is effortless
- For indoor use, it can be easily cleaned with a duster or a slightly damp cloth
- For exteriors, it can be washed with low-pressure water or mild soapy water free of abrasive acids
- Never use thinners, hydrochloric acid, or harsh chemical solvents for cleaning
- In outdoor applications, it is recommended to inspect the painted surface every few years and repaint if necessary to extend the paint's lifespan and maintain UV protection
Is the P9003A window pediment resistant to outdoor weather conditions?
Yes, the product is manufactured from high-density (150-220 kg/m³) rigid polyurethane. Thanks to its closed-cell structure, it has low water absorption (below 1%) and is unaffected by moisture. It maintains its shape in temperatures ranging from -100 °C / +80 °C without cracking or shrinking. For long-lasting outdoor performance, it must be painted with a UV-resistant exterior paint after installation.
Which adhesive should I use during installation?
To ensure a secure and long-lasting bond, you should use the specially formulated Polure Polfix polyurethane adhesive. Standard silicones or other solvent-based adhesives can damage the polyurethane material or lose their strength over time, causing the product to detach.
Can the product be used directly without painting?
No, the product must be painted to ensure longevity and protect it from UV damage, especially in outdoor settings. Unpainted polyurethane can yellow over time when exposed to sunlight. The product comes pre-primed from the factory and is ready to be painted with any water-based or synthetic paint.
What are its advantages compared to plaster or wood alternatives?
Compared to plaster, polyurethane is extremely lightweight and impact-resistant, making it easy to install with limited load on the structure. Compared to wood, it is completely unaffected by moisture, water, and pests, meaning it won't rot or warp over time. It also offers a much higher level of detail and a smoother finish.
Is it necessary to apply an additional primer over the factory coat?
The factory primer prepares the surface for painting. However, paint manufacturers do not guarantee paint performance unless their own system primer is used. Therefore, applying an additional primer coat to enhance paint durability is optional and entirely up to the customer.
Polyurethane curved arches designed to match the P9003A decorative trim
Create a cohesive architectural look by pairing these curved arch profiles with the P9003A decorative molding. Ideal for elegant interior and exterior framing projects.




















Polyurethane curved arches designed to match the P9003A decorative molding trim
Enhance your architectural designs with these matching curved arches, perfectly coordinated with the P9003A decorative molding. These durable polyurethane elements ensure a seamless, cohesive look for premium interior and exterior projects.














Frequently Used Together
Similar Products(Window Surround Ornament)
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%, completely 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.
- The P9003A trapezoidal window accent offers a wide range of applications
- In exterior designs, it is primarily placed at the top center of window frames to serve as a decorative keystone
- It can also be positioned beneath cornices or eaves as a decorative bracket or corbel on villas, hotels, and residential facades
- For interior decoration, it is ideal as a crowning detail on door frames, a side support on classic fireplace mantels, or an aesthetic corbel beneath decorative wall shelving
- With the right painting techniques, it blends seamlessly into both classical and modern neo-classical architectural concepts
- The application surface must be completely free of dust, dirt, and moisture
- Apply Polure Polfix polyurethane adhesive, which provides a strong bond, to the back of the product (standard silicone adhesives must not be used for installation)
- Once the adhesive is applied, place the product on the wall and secure it mechanically with screws
- Cover screw heads and joints with an exterior-grade acrylic filler
- After the filler dries, sand with 180-220 grit sandpaper to achieve a smooth finish
- Optionally, apply an additional coat of primer, then complete the installation by applying at least two coats of UV-resistant paint for exteriors, or water-based/synthetic paint for interiors
- Thanks to the closed-cell structure of polyurethane, maintenance is effortless
- For indoor use, it can be easily cleaned with a duster or a slightly damp cloth
- For exteriors, it can be washed with low-pressure water or mild soapy water free of abrasive acids
- Never use thinners, hydrochloric acid, or harsh chemical solvents for cleaning
- In outdoor applications, it is recommended to inspect the painted surface every few years and repaint if necessary to extend the paint's lifespan and maintain UV protection
Is the P9003A window pediment resistant to outdoor weather conditions?
Yes, the product is manufactured from high-density (150-220 kg/m³) rigid polyurethane. Thanks to its closed-cell structure, it has low water absorption (below 1%) and is unaffected by moisture. It maintains its shape in temperatures ranging from -100 °C / +80 °C without cracking or shrinking. For long-lasting outdoor performance, it must be painted with a UV-resistant exterior paint after installation.
Which adhesive should I use during installation?
To ensure a secure and long-lasting bond, you should use the specially formulated Polure Polfix polyurethane adhesive. Standard silicones or other solvent-based adhesives can damage the polyurethane material or lose their strength over time, causing the product to detach.
Can the product be used directly without painting?
No, the product must be painted to ensure longevity and protect it from UV damage, especially in outdoor settings. Unpainted polyurethane can yellow over time when exposed to sunlight. The product comes pre-primed from the factory and is ready to be painted with any water-based or synthetic paint.
What are its advantages compared to plaster or wood alternatives?
Compared to plaster, polyurethane is extremely lightweight and impact-resistant, making it easy to install with limited load on the structure. Compared to wood, it is completely unaffected by moisture, water, and pests, meaning it won't rot or warp over time. It also offers a much higher level of detail and a smoother finish.
Is it necessary to apply an additional primer over the factory coat?
The factory primer prepares the surface for painting. However, paint manufacturers do not guarantee paint performance unless their own system primer is used. Therefore, applying an additional primer coat to enhance paint durability is optional and entirely up to the customer.







