Polyurethane Handrail Profile for Balustrade Systems
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Smooth, flat |
| 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 | 200 × 2400 × 50 mm |
| Weight | 3.15 kg |
| Sales Unit | piece |
Details
Support
Technical drawing: Download DWG (39 KB)
Similar Products(Handrails and Balusters System)
The PBK20 is a premium architectural capping solution designed to offer structural definition and long-lasting durability for modern and classical balustrade systems. Engineered to serve as a robust top rail, this profile bridges the gap between historical aesthetics and advanced polymer technology. It provides a crisp, clean finish for balcony barriers, terrace borders, and indoor staircases, enhancing the overall architectural value of any high-end residential or commercial property.
Manufactured from high-density rigid polyurethane (150-220 kg/m³), the PBK20 offers a wood-like hardness and impact resistance without the associated weight or structural strain on the building. With physical dimensions measuring 2400 mm in length, 200 mm in width, and 50 mm in height, it is ideally proportioned for comfortable gripping. Its closed-cell structure provides low water absorption, making it resistant to rot, moisture expansion, and insect infestation. Designed to withstand extreme environmental conditions, it maintains its physical form and dimensional stability, which has been tested between -20 °C and +70 °C.
Visually, the PBK20 features a flat, smooth top face accented by symmetrical stepped profiling along the outer edges. The underside of the profile is engineered with a hollowed-out channel designed to securely sit atop baluster columns or supporting structural frameworks. This precise geometric design ensures seamless alignment and clean joint lines, adapting effortlessly to Neoclassical, Baroque, or contemporary minimalist design schemes.
This versatile profile is highly recommended for finishing outdoor balcony railings, grand internal stairwells, patio boundaries, and French window barriers. Its lightweight nature makes it particularly advantageous for elevated terraces and retrofitting projects where traditional stone or concrete rails would impose too much dead weight on the underlying structure.
Compared to plaster, which is prone to chipping, or timber, which requires constant sealing against moisture, this polyurethane option offers a low-maintenance, high-performance alternative. The profile is delivered with a factory-applied primer that prepares the surface for painting. While this coating provides an excellent base, the application of an additional primer is optional and remains at the discretion of the customer based on their paint manufacturer's warranty guidelines. Installation requires polyurethane (PU) assembly adhesive combined with mechanical screw fastening for structural safety.
- The PBK20 is specifically designed as a functional and decorative top rail for balustrade and railing systems
- In outdoor residential architecture, it serves as the perfect finishing capping for villa balconies, wide open terraces, patio boundaries, and French balconies
- Indoors, it can be utilized as a heavy-duty handrail for grand staircases, mezzanine gallery openings, and hotel lobby railings
- For a complete classical look, it is best paired with matching polyurethane baluster columns
- When installed in outdoor areas exposed to direct sunlight, a UV-resistant topcoat paint must be applied to protect the material from color changes over time
- Ensure the mounting surfaces of both the handrail and the supporting balusters are clean, dry, and free of dust
- Cut the PBK20 profile to the required lengths using a fine-toothed saw, executing precise 45-degree miter cuts for corner connections
- Apply polyurethane (PU) assembly adhesive generously along the bottom channel and joint interfaces
- Secure the handrail mechanically using screws to ensure absolute structural stability
- Fill all screw holes and joint seams with an exterior-grade joint compound
- Once dry, sand the filled areas smooth using 180-220 grit sandpaper
- Although the product features a factory primer, applying an additional primer is optional
- Finish the installation with two coats of high-quality water-based or synthetic paint, ensuring UV-resistant paint is used for all outdoor applications
- Polyurethane architectural elements require minimal long-term maintenance due to their non-porous, moisture-resistant surface
- For indoor applications, simple dusting or wiping with a damp cloth is sufficient
- For outdoor installations, a visual inspection of the paint layer is recommended once a year
- If environmental exposure causes micro-cracks in the paint, the surface can be easily restored by applying an exterior-grade joint sealant, lightly sanding, and reapplying a fresh coat of UV-resistant paint
- Avoid using high-pressure power washers or harsh abrasive chemical cleaners on the painted surfaces
Can the PBK20 handrail be used safely on outdoor balconies?
Yes, the PBK20 is highly suitable for outdoor use. Made from rigid polyurethane with a closed-cell structure, its water absorption is under 1%, preventing rot, swelling, or mold. Its dimensional stability has been tested between -20 °C and +70 °C. For outdoor installations, applying a UV-resistant topcoat paint is mandatory to prevent yellowing.
How does polyurethane compare to traditional wood or stone handrails?
Polyurethane is significantly lighter than stone or concrete, reducing the dead load on balconies and structural slabs. Unlike wood, it does not warp, rot, crack, or attract wood-boring insects, making it a much more durable and low-maintenance option for both indoor and outdoor settings.
Is it necessary to apply an extra primer before painting the PBK20?
The PBK20 comes with a high-quality factory-applied primer that prepares the surface for paint. However, because paint manufacturers do not guarantee paint adhesion without their own system primers, applying an additional primer is optional and left to the preference of the installer.
What adhesive should be used for installing this handrail?
You must use a high-quality polyurethane (PU) assembly adhesive for all joints and mounting surfaces. Standard silicone or water-based adhesives should not be used. Additionally, mechanical fastening with screws is mandatory to ensure the handrail is safely secured to the balusters.
Is the PBK20 handrail load-bearing on its own?
While rigid polyurethane has a high density (150-220 kg/m³) and excellent structural hardness, it is designed as a decorative capping. For structural safety and load-bearing handrail applications, it should be installed over an internal steel, wood, or aluminum support rail.