Polyurethane Curved Handrail and Balustrade Top Cap Profile
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Flat, smooth-surfaced and classic-lined |
| 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 | 385 × 1336 × 50 mm |
| Sales Unit | piece |
Details
Support
The PBK28D304H curved top cap profile is a decorative architectural element specially developed for corner transitions or circular designs of balcony and staircase balustrades. Combining classic architectural details with modern production technology, this piece ensures that balustrade systems form a seamless and fluid line. Working in integration with baluster and handrail systems, it can be safely preferred for both indoor circular stairs and outdoor terrace railings. Providing integrity in projects, this special piece easily solves the challenging turns of circular forms.
The product measures 38.5 cm in width, 133.6 cm in length, and 5 cm in thickness. The high-density rigid polyurethane raw material (150-220 kg/m³) used in its production gives the material a physical resistance comparable to wood while offering an extremely lightweight structure. This lightweight design prevents additional loads on structures during installation, preserving the static safety of buildings. Thanks to its closed-cell structure, its water absorption rate is below 1%, completely preventing deformations such as swelling, cracking, rotting, or insect infestation in outdoor environments. With a temperature resistance ranging from -100 °C / +80 °C, it maintains its dimensional stability during seasonal temperature fluctuations.
Looking at its visual design, the product features classic profile lines with concave and convex steps. Its smooth and clean lines offer a seamless miter joint in circular turns. The factory-applied primer smooths the surface, making it ready for the final coat of paint. It should be noted that the unpainted rigid foam material may turn yellow when exposed to sunlight outdoors; therefore, UV-resistant paint must be preferred for exterior applications. Offering much sharper and flawless details compared to traditional casting or carving techniques, this piece achieves a flawless appearance once painted.
Featuring a wide range of applications, this curved handrail profile serves as a complementary element for villa entrance stairs, circular gallery voids in hotel lobbies, wide balcony railings, and exterior veranda balustrades in residential projects. Unlike traditional materials like wood or marble, it retains its shape in humid environments, promising long-lasting use. As an alternative to heavy concrete or marble balustrades, it is ideal for highlighting circular lines without putting weight on the load-bearing system.
During the installation process, it is critical that the surface is dry and clean. The profile should be adhered to the application area using Polure Polfix adhesive and then mechanically secured with screws. Once the screw holes and joints are sealed with flexible exterior filler and smoothed with 180-220 grit sandpaper, the painting process can begin. Although the factory-applied primer prepares the surface for paint, an additional primer application is optional according to the warranty conditions of paint manufacturers, and the choice belongs to the customer. Polure does not guarantee the quality of the paints used or the application results.
- This curved handrail profile is used as a top finishing element for balustrades, especially in architectural projects with circular and oval lines
- Indoors, it is preferred for the circular turns of luxury villa staircases and the handrails of open gallery voids in hotel and business center lobbies
- Outdoors, it is used to connect balusters from the top in villa balconies, wide terrace borders, veranda railings, and balustrade systems on garden walls
- When painted with a suitable exterior paint, it shows excellent resistance to outdoor weather conditions
- The application surface must be completely free of dust and moisture
- Only Polure Polfix adhesive should be applied to the mounting surface of the profile, and the product should be set in place
- In addition to gluing, it is mandatory to mechanically secure the product using screws
- Screw heads and joints are sealed with flexible exterior filler
- After the filler dries, it is smoothed with 180-220 grit sandpaper
- An optional additional primer can be applied on the factory-primed surface, followed by at least 2 coats of water-based or synthetic paint
- UV-resistant paint must be used outdoors
- Assess water and moisture exposure using the product technical data, surface finish and installation details
- Abrasive acids, thinners, or harsh chemical solvents should not be used during cleaning
- For outdoor use, it is recommended to inspect the surface once a year and renew the paint if necessary to extend the life of the paint
- Any minor damage that may occur due to impact can be easily repaired with filler and sanding, and then spot-painted
Is it affected by rain and sun when used outdoors?
Thanks to its closed-cell structure, the product has a water absorption rate of less than 1%. Therefore, it is absolutely unaffected by rain, snow, and moisture, and will not rot or swell. However, to prevent yellowing when exposed to solar UV rays, it must be painted with UV-resistant paint for exterior applications.
Which adhesive should be used for installation?
To ensure a strong and long-lasting bond during installation, only Polure Polfix polyurethane adhesive should be used. Low-flexibility adhesives like silicone may cause separation in the long run. Additionally, mechanical securing with screws is mandatory alongside gluing.
Can paint be applied directly, or is an additional primer required?
The product is shipped from the factory with a special white primer coat, which facilitates paint adhesion. However, paint brands do not provide a paint warranty for applications made without their own primers. Therefore, an additional primer application is completely optional, and the choice and responsibility belong to the customer.
What are its advantages compared to wood or marble handrails?
With its rigid structure of 150-220 kg/m³ (production target ~160 kg/m³) density, it has the hardness of wood but is much lighter. It does not put extra load on the static structure of buildings. Unlike wood, it does not harbor insects, warp, or crack due to moisture. It is not fragile like marble, making its transport and installation much more practical.
Does the curved shape fit every project?
This curved piece, measuring 38.5 cm in width and 133.6 cm in length, is designed according to a specific circular diameter. It generally offers standard compatibility for wide curved balcony turns and circular stair landings. It can be adapted by cutting or joining according to the curve radius of your project.
The PBK28D304H curved top cap profile is a decorative architectural element specially developed for corner transitions or circular designs of balcony and staircase balustrades. Combining classic architectural details with modern production technology, this piece ensures that balustrade systems form a seamless and fluid line. Working in integration with baluster and handrail systems, it can be safely preferred for both indoor circular stairs and outdoor terrace railings. Providing integrity in projects, this special piece easily solves the challenging turns of circular forms.
The product measures 38.5 cm in width, 133.6 cm in length, and 5 cm in thickness. The high-density rigid polyurethane raw material (150-220 kg/m³) used in its production gives the material a physical resistance comparable to wood while offering an extremely lightweight structure. This lightweight design prevents additional loads on structures during installation, preserving the static safety of buildings. Thanks to its closed-cell structure, its water absorption rate is below 1%, completely preventing deformations such as swelling, cracking, rotting, or insect infestation in outdoor environments. With a temperature resistance ranging from -100 °C / +80 °C, it maintains its dimensional stability during seasonal temperature fluctuations.
Looking at its visual design, the product features classic profile lines with concave and convex steps. Its smooth and clean lines offer a seamless miter joint in circular turns. The factory-applied primer smooths the surface, making it ready for the final coat of paint. It should be noted that the unpainted rigid foam material may turn yellow when exposed to sunlight outdoors; therefore, UV-resistant paint must be preferred for exterior applications. Offering much sharper and flawless details compared to traditional casting or carving techniques, this piece achieves a flawless appearance once painted.
Featuring a wide range of applications, this curved handrail profile serves as a complementary element for villa entrance stairs, circular gallery voids in hotel lobbies, wide balcony railings, and exterior veranda balustrades in residential projects. Unlike traditional materials like wood or marble, it retains its shape in humid environments, promising long-lasting use. As an alternative to heavy concrete or marble balustrades, it is ideal for highlighting circular lines without putting weight on the load-bearing system.
During the installation process, it is critical that the surface is dry and clean. The profile should be adhered to the application area using Polure Polfix adhesive and then mechanically secured with screws. Once the screw holes and joints are sealed with flexible exterior filler and smoothed with 180-220 grit sandpaper, the painting process can begin. Although the factory-applied primer prepares the surface for paint, an additional primer application is optional according to the warranty conditions of paint manufacturers, and the choice belongs to the customer. Polure does not guarantee the quality of the paints used or the application results.
- This curved handrail profile is used as a top finishing element for balustrades, especially in architectural projects with circular and oval lines
- Indoors, it is preferred for the circular turns of luxury villa staircases and the handrails of open gallery voids in hotel and business center lobbies
- Outdoors, it is used to connect balusters from the top in villa balconies, wide terrace borders, veranda railings, and balustrade systems on garden walls
- When painted with a suitable exterior paint, it shows excellent resistance to outdoor weather conditions
- The application surface must be completely free of dust and moisture
- Only Polure Polfix adhesive should be applied to the mounting surface of the profile, and the product should be set in place
- In addition to gluing, it is mandatory to mechanically secure the product using screws
- Screw heads and joints are sealed with flexible exterior filler
- After the filler dries, it is smoothed with 180-220 grit sandpaper
- An optional additional primer can be applied on the factory-primed surface, followed by at least 2 coats of water-based or synthetic paint
- UV-resistant paint must be used outdoors
- Assess water and moisture exposure using the product technical data, surface finish and installation details
- Abrasive acids, thinners, or harsh chemical solvents should not be used during cleaning
- For outdoor use, it is recommended to inspect the surface once a year and renew the paint if necessary to extend the life of the paint
- Any minor damage that may occur due to impact can be easily repaired with filler and sanding, and then spot-painted
Is it affected by rain and sun when used outdoors?
Thanks to its closed-cell structure, the product has a water absorption rate of less than 1%. Therefore, it is absolutely unaffected by rain, snow, and moisture, and will not rot or swell. However, to prevent yellowing when exposed to solar UV rays, it must be painted with UV-resistant paint for exterior applications.
Which adhesive should be used for installation?
To ensure a strong and long-lasting bond during installation, only Polure Polfix polyurethane adhesive should be used. Low-flexibility adhesives like silicone may cause separation in the long run. Additionally, mechanical securing with screws is mandatory alongside gluing.
Can paint be applied directly, or is an additional primer required?
The product is shipped from the factory with a special white primer coat, which facilitates paint adhesion. However, paint brands do not provide a paint warranty for applications made without their own primers. Therefore, an additional primer application is completely optional, and the choice and responsibility belong to the customer.
What are its advantages compared to wood or marble handrails?
With its rigid structure of 150-220 kg/m³ (production target ~160 kg/m³) density, it has the hardness of wood but is much lighter. It does not put extra load on the static structure of buildings. Unlike wood, it does not harbor insects, warp, or crack due to moisture. It is not fragile like marble, making its transport and installation much more practical.
Does the curved shape fit every project?
This curved piece, measuring 38.5 cm in width and 133.6 cm in length, is designed according to a specific circular diameter. It generally offers standard compatibility for wide curved balcony turns and circular stair landings. It can be adapted by cutting or joining according to the curve radius of your project.