U-Lock polycarbonate roofing system is a multiwall standing-seam daylighting solution engineered for large-span roofs, skylights, canopies and curtain-wall applications. As a manufacturer, Jietai produces U-Lock panels in two standard widths — 600 mm and 1040 mm — with thicknesses from 6 mm to 40 mm, offered in single-hook and double-hook lock configurations. This 2026 guide lists the complete size, thickness and performance data you need to specify the right panel for your project.
U-Lock Panel Specifications at a Glance (2026)
The table below summarizes the full available range of our U-Lock panels.
| Standard width | 600 mm / 1040 mm |
| Thickness | 6, 8, 10, 12, 14, 16, 18, 20, 25, 30, 32, 40 mm |
| Structure | Double-wall, four-wall, six-wall, honeycomb / cross-reinforced |
| Standard length | 6000 mm (6 m); custom 1–30 m |
| Lock type | Single-hook (6–12 mm) / double-hook (14 mm and above) |
| Cold bending | Yes — minimum radius 3–8 m |
| Waterproofing | 100% physical (double-layer stepped water barrier) |
| UV protection | Co-extruded UV layer, single or double side |
| Colors | Clear, opal white, bronze, lake blue, grass green, grey (custom RAL) |
| Light transmission | 20–82% depending on thickness and color |
| Fire rating | B1 (GB 8624), UL94 V-2 |
| Temperature range | −40 °C to +120 °C |
| Wind uplift | Up to 6.5 kPa (FM-certified standard) |
Thickness, Structure and Application Guide
U-Lock panels are extruded in several multiwall structures. Thicker, more reinforced grades carry larger spans and heavier loads.
| Thickness | Structure | Lock type | Typical application |
|---|---|---|---|
| 6 / 8 / 10 mm | Double-wall | Single-hook | Courtyard canopies, corridor daylighting, small partitions |
| 12 / 14 / 16 mm | Four-wall | Single / double-hook | Carports, shopfronts, small skylights |
| 16 / 18 / 20 mm | Six-wall / honeycomb | Double-hook | Insulated roofs, northern-climate projects |
| 20 / 25 / 30 mm | Cross-reinforced | Double-hook | Large-span roofs, stadium canopies |
| 32 / 40 mm | Thick custom | Double-hook | Insulated curtain-wall applications |
How the U-Lock Connection Works
Each panel edge is formed into a U-shaped hook that locks onto the adjacent panel through an aluminum (or polycarbonate) connector profile. The double-hook design used on 14 mm and thicker panels wraps both edges into a stepped, interlocking joint. Because the two-layer step physically sheds water, the joints are 100% waterproof without sealant — a key advantage over screw-fixed FRP sheets, which leak when fasteners loosen or the sheet is deformed by thermal movement. No fasteners pierce the panel surface, so there is no path for water to penetrate and no exposed screw heads to corrode.
Cold Bending and Installation
U-Lock panels cold-bend along their length to a minimum radius of 3–8 m depending on thickness, so they suit arched canopies and curved daylighting roofs. Panels are always bent along the length, never across the width. Installation uses a complete system: aluminum U-channel and I-beam purlins, EPDM gaskets and hidden sliding fasteners that let the panels expand and contract freely with temperature — eliminating thermal stress, cracking and leaks over the service life.
Where U-Lock Panels Are Used
U-Lock polycarbonate systems are specified for projects that need a large, watertight daylighting area with a clean standing-seam appearance:
- Factory and warehouse daylighting roofs
- Stadium and gymnasium canopies
- Greenhouse and agricultural buildings
- High-speed rail station and airport canopies
- Carports and parking canopies
- Curved and arched roofs
Why Source U-Lock Panels from Jietai
As a manufacturer, Jietai extrudes U-Lock polycarbonate panels on our own production line with double-sided co-extruded UV protection and consistent wall thickness. We supply the complete system — panels, aluminum U-channel, I-beam purlins, EPDM gaskets and sliding fasteners — in standard and custom sizes, with third-party test reports (UL94, B1, wind-uplift) available on request. Panels are cut to length and can be pre-processed to shorten on-site installation time.
Frequently Asked Questions
What widths are U-Lock polycarbonate panels available in?
Two standard widths: 600 mm and 1040 mm. The 600 mm series suits small canopies and daylighting bands, while the 1040 mm series is the engineering workhorse for large-span roofs, skylights and stadium canopies.
How thick can U-Lock panels be?
From 6 mm up to 40 mm, in twelve standard thickness grades. Thicker panels use reinforced six-wall or cross-reinforced structures to carry larger spans and heavier snow and wind loads.
Can U-Lock panels be cold-bent for curved roofs?
Yes. U-Lock panels cold-bend along their length to a minimum radius of 3–8 m depending on thickness, making them suitable for arched canopies and curved daylighting roofs.
Is the U-Lock system waterproof?
Yes. The double-hook lock and double-layer stepped water barrier provide 100% physical waterproofing, so no sealant is required along the panel joints — unlike screw-fixed FRP sheets that leak when fasteners loosen.
What is the maximum panel length?
Standard panels ship at 6 m, and custom lengths from 1 m up to 30 m can be cut to order; longer lengths require special transport.
U-Lock specifications scale with thickness, width and quantity. Contact our team for a quote and we will price your exact panel specification, size and quantity within one business day.
