Polyurethane Curved Handrail and Balustrade Profile
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Flat, smooth-surfaced and classic-lined |
| 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 | 385 × 1336 × 50 mm |
| Sales Unit | piece |
Details
Support
Similar Products(Handrails and Balusters System)
The PBK28D304H is a premium curved polyurethane handrail section engineered to provide structural elegance and clean transitions for high-end architectural railing systems. Specifically designed to form smooth, sweeping curves on balconies, terraces, and grand staircases, this component solves the complex challenge of managing rounded corners in balustrade layouts. It functions as a durable top cap that seamlessly integrates with decorative balusters, enhancing both the safety and visual appeal of luxury residential and commercial properties.
Manufactured with a high-density rigid polyurethane formulation (150-220 kg/m³), this profile offers the structural rigidity and physical hardness of traditional hardwoods while remaining remarkably lightweight. With dimensions of 1336 mm in length, 385 mm in width, and a solid 50 mm thickness, it provides a substantial, reassuring grip. Unlike plaster, which is prone to chipping, or timber, which suffers from moisture degradation, this material maintains absolute dimensional stability, resisting warping, splitting, and rotting even under challenging environmental conditions.
Visually, the PBK28D304H features a classic, stepped profile with deep, symmetrical molding lines that catch the light beautifully. The curved design is engineered with a precise radius, allowing architects and builders to execute flawless 90-degree transitions or custom rounded balustrade corners. The surface arrives with a smooth, factory-applied primer coat, ensuring an even substrate that is ready to accept high-quality topcoats without requiring intensive surface preparation.
This versatile curved handrail is highly favored by European design professionals for a wide array of applications. It is frequently specified for luxury villa balconies, expansive hotel lobby gallery voids, elevated restaurant terraces, and curved classical staircases. Its water-resistant, closed-cell structure (absorbing less than 1% moisture) makes it equally suited for high-humidity indoor spaces and exposed outdoor facades, provided it is finished with the correct protective coatings.
Installing the PBK28D304H is highly efficient compared to heavy stone or concrete alternatives. The process requires securing the profile to a clean, dry substrate using a high-performance polyurethane (PU) mounting adhesive, combined with mandatory mechanical screw fixing for structural safety. Joints and screw holes are then filled with an elastic exterior-grade filler, sanded smooth with 180-220 grit paper, and finished with two coats of UV-resistant paint to protect the material from prolonged solar exposure.
- This curved handrail profile is specifically designed for capping rounded sections of balustrades and railings
- It is highly recommended for luxury residential villas, boutique hotels, and premium restaurant terraces where sweeping curved balconies or grand staircases require a continuous, elegant top rail
- It works perfectly in combination with vertical balusters (badastrols) to form complete barrier systems
- For outdoor applications, such as terrace borders, poolside barriers, and open-air galleries, ensure the handrail is coated with a high-quality UV-resistant paint to prevent yellowing
- Indoors, it serves as an excellent feature on sweeping stairwells, mezzanine overlooks, and decorative interior partitions
- Ensure the installation surface is clean, dry, and structurally sound
- Measure and execute any necessary 45-degree miter cuts using a fine-toothed saw
- Apply a generous bead of polyurethane (PU) mounting adhesive to the mounting surfaces (do not use silicone)
- Position the handrail and secure it mechanically using corrosion-resistant screws to ensure safety and stability
- Fill all screw heads and joint lines with a flexible polyurethane filler
- Once cured, sand the joints smoothly using 180-220 grit sandpaper
- While the product comes with a factory-applied primer, paint manufacturers recommend applying an appropriate local primer to validate their paint warranties
- Finish by applying two coats of high-quality water-based or synthetic paint (UV-resistant paint is mandatory for all outdoor installations)
- Maintenance of this polyurethane handrail is straightforward and cost-effective
- For routine cleaning, wipe the surface with a damp cloth and mild, non-abrasive detergent
- Avoid using harsh acidic chemicals, solvents, or high-pressure washers, which can damage the paint layer
- For outdoor installations, perform an annual visual inspection of the paint finish; if the protective paint layer shows signs of weathering, a light sanding and a fresh topcoat will restore its appearance and UV protection
- Minor physical impacts can be easily repaired on-site using standard exterior filler, followed by light sanding and spot painting
Can this curved handrail profile be used on outdoor balconies?
Yes, the PBK28D304H is fully suitable for outdoor use. Thanks to its closed-cell polyurethane structure, it has a water absorption rate under 1%, meaning it will not rot, swell, or crack when exposed to rain, snow, or humidity. To ensure long-term durability against sunlight, it must be finished with a high-quality UV-resistant outdoor paint.
What type of adhesive should be used for installing this handrail?
You must use a high-quality polyurethane (PU) mounting adhesive for all joints and mounting surfaces. Standard silicone adhesives do not provide the necessary bond strength or flexibility for rigid polyurethane profiles and should be strictly avoided.
Does the handrail require mechanical fastening during installation?
Yes, mechanical fastening with screws is mandatory. Because handrails are subject to physical contact and load-bearing pressure, relying solely on adhesive is not safe. Screws must be countersunk, and the holes filled, sanded, and painted over during finishing.
Do I need to apply an additional primer before painting?
The product is delivered with a high-quality factory-applied primer that prepares the surface for painting. However, paint manufacturers typically do not guarantee paint adhesion or longevity without the use of their own priming products. Therefore, applying an additional primer is optional but highly recommended to ensure the durability of your final paint coats.
How does this polyurethane handrail compare to traditional wood or stone?
Unlike wood, polyurethane does not rot, split, or attract insects. Unlike natural stone or concrete, it is incredibly lightweight (150-220 kg/m³ density), meaning it is lightweight, puts only a limited load on the structure, and is significantly easier and cheaper to transport and install, while maintaining a similar physical hardness and premium surface detail.