Polyurethane Handrail Profile for Balustrades and Balconies
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Flat, smooth |
| Color | White |
| Density | 150-220 kg/m³ |
| Water Absorption | below 1% |
| Dimensional Stability Test | -20 °C / +70 °C |
| Fire Class | B2 (DIN 4102-1) |
| Paintable | Yes |
| Usage | Indoor + Outdoor |
| Water Resistant | Yes |
| Dimensions | 278 × 2400 × 50 mm |
| Weight | 3.57 kg |
| Sales Unit | piece |
Details
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Technical drawing: Download DWG (41 KB)
Similar Products(Handrails and Balusters System)
The PBK28 is a professional-grade architectural handrail profile engineered to provide a durable, refined capping solution for balustrade systems, terraces, and staircases. Manufactured from high-density rigid polyurethane, this profile offers the structural presence and touch of premium timber without any of the natural vulnerabilities. It serves as an excellent finishing cap for both residential and commercial properties looking to achieve a classic architectural aesthetic.
With dimensions of 278 mm in width, 2400 mm in length, and 50 mm in thickness, this profile features a dense composition of 150-220 kg/m³. Its closed-cell structure ensures a water absorption rate of less than 1%, making it highly resistant to moisture, rot, and insect infestation. Dimensional stability has been tested within a temperature range of -20 °C to +70 °C, with no warping, shrinking, or cracking over time.
Aesthetically, the PBK28 presents a smooth, flat top surface paired with elegant stepped profiles along the outer edges, facilitating a comfortable grip and a clean shadow line. The underside of the profile is engineered with integrated structural channels designed to seamlessly fit over standard baluster tops or metal sub-frames, simplifying alignment during installation and ensuring a secure, flush fit.
This high-density capping profile is ideal for finishing balcony railings, veranda boundaries, terrace borders, and grand indoor or outdoor staircases. Its lightweight nature significantly reduces structural loads on cantilevered balconies and simplifies logistics on-site, making it a preferred choice for architects and contractors working on premium European restoration and new-build projects.
Installation is straightforward and efficient. The profile is mounted using high-quality polyurethane (PU) assembly adhesive combined with mandatory mechanical screw fastening for structural safety. The product arrives with a factory-applied primer coat that prepares the surface for painting. Please note that while this primer provides an excellent base, the application of an additional primer prior to the final topcoat is optional and depends on the specific guidelines of your chosen paint manufacturer.
- This wide architectural handrail profile is specifically engineered for capping balustrade systems, balcony edges, and structural railings
- In outdoor residential projects, such as classical villas, coastal estates, or commercial hotel terraces, it serves as a weather-resistant cap over baluster columns
- Indoors, it is highly suitable for grand staircases in luxury hotel lobbies, private residences, or corporate offices
- Its substantial 278 mm width is ideal for concealing underlying concrete, stone, or steel reinforcement rails, providing a smooth and comfortable surface to touch
- For all outdoor applications, finishing the profile with a UV-resistant paint is mandatory to prevent discoloration from sunlight exposure
- Ensure the mounting surface is clean, dry, and free of dust
- Cut the PBK28 profile to the required lengths using standard woodworking miter saws
- Apply a continuous bead of high-quality polyurethane (PU) assembly adhesive along the contact surfaces
- Secure the profile mechanically using stainless steel screws to guarantee structural stability
- Fill all joints and screw heads with an exterior-grade acrylic filler, and sand smooth with 180-220 grit sandpaper once dry
- The product comes pre-primed from the factory; however, the use of an additional primer before applying the final two coats of paint is optional and should align with your paint supplier's warranty requirements
- Use premium UV-resistant paint for all exterior installations
- The closed-cell polyurethane structure requires minimal maintenance compared to traditional timber or concrete
- It does not rot, swell, or host mold
- For routine maintenance, wipe the surface with a damp cloth and mild detergent
- High-pressure water washing is safe for outdoor installations, but abrasive chemicals or solvents must be avoided
- We recommend inspecting the paint finish annually in high-exposure outdoor areas and reapplying a UV-resistant topcoat if weathering is visible
Can the PBK28 profile be used on outdoor balconies?
Yes, the PBK28 is fully suitable for outdoor use. Its closed-cell structure prevents water absorption, ensuring it will not rot or crack. To protect it from UV radiation, it must be painted with a high-quality UV-resistant exterior paint.
How does this handrail compare to traditional wood or concrete?
Unlike wood, it does not rot, warp, or attract pests, eliminating the need for constant sanding and sealing. Compared to concrete, it is exceptionally lightweight, which reduces the structural load on balconies and makes installation significantly faster and safer.
Is the use of mechanical fasteners mandatory during installation?
Yes, for safety and structural integrity, the PBK28 must be secured using both a high-quality polyurethane (PU) assembly adhesive and mechanical stainless steel screws. Adhesive alone is not sufficient for handrail applications.
Do I need to apply an extra primer before painting?
The product is delivered with a factory-applied primer that prepares the surface for topcoating. However, applying an additional primer is optional and depends on the requirements and warranty terms of your specific paint manufacturer.
Is this handrail profile load-bearing?
While the high-density polyurethane is extremely rigid and durable, the handrail itself must be installed over a structurally sound metal, concrete, or wood sub-frame to meet local building safety codes for load-bearing balustrades.