U-Lock Polycarbonate Sheet — Leak-Proof Interlocking PC Roofing System
U-Lock polycarbonate sheets represent a revolutionary advancement in polycarbonate roofing technology. Unlike traditional screw-fixed panels, the U-Lock system uses an innovative interlocking design where each panel locks securely into the next, creating a completely sealed, leak-proof roof surface. This eliminates the need for exposed fasteners, reducing installation time and preventing common issues like leaks around screw holes, thermal expansion stress, and corrosion over time.
Key Features
- Leak-Proof Design: The male-to-female interlocking connection creates a watertight seal without exposed screws or fasteners
- No Thermal Stress Cracks: The interlocking system allows natural thermal expansion and contraction, preventing stress cracks around screw holes common in traditional panels
- UV Protection: Co-extruded UV-resistant layer on both sides prevents yellowing and degradation for over 10 years
- Lightweight: Weighs only 1/3 of glass, reducing structural load requirements
- High Impact Resistance: 200+ times stronger than glass, providing superior safety
- Easy Installation: Panels simply click together, reducing installation time by up to 50% compared to screw-fixed systems
- Thermal Insulation: Multi-wall structure provides excellent insulation, reducing heating and cooling costs
Technical Specifications
Width Options
| Series | Module Width | Application |
| Narrow U-Lock | 600mm | Small canopies, skylights, light-duty projects |
| Standard Wide U-Lock | 1040mm | Large roofs, stadiums, greenhouses — most common |
Thickness & Structure (600mm Series)
| Thickness | Chambers | Application |
| 6mm, 8mm, 10mm | 1–2 chambers, single hook | Small awnings, corridor skylights, partitions |
| 12mm, 14mm, 16mm | 3 chambers, single/double hook | Carports, shop canopies, medium skylights |
| 16mm, 18mm, 20mm | 5–6 chambers, honeycomb/X-grid | Insulated roofs, sound-insulated ceilings |
Thickness & Structure (1040mm Series — Engineering Mainstream)
| Thickness | Chambers | Application |
| 8mm, 10mm, 12mm, 14mm, 16mm | 2–3 chambers, rectangular lock | General engineering, standard factory skylights |
| 20mm, 25mm, 30mm | 4–6 chambers, X-grid reinforced | Large-span roofs, stadiums, multi-span greenhouses |
| 32mm, 40mm | 5–8 chambers, heavy-duty | Insulated curtain walls, extreme cold environments |
Standard Length
| Standard | 6,000mm (6m) |
| Custom Range | 1m – 12m (standard transport) |
| Common Roofing Lengths | 3m, 6m, 9m, 12m |
| Ultra-Long Custom | Up to 30m (special transport required) |
Colors
| Standard Colors | Clear, Opal White, Bronze, Blue, Green, Grey, Custom RAL |
U-Lock System Components
| Component | Function | Material |
| Aluminum U-Channel | Edge fixing and finishing | Aluminum 6063-T5 |
| Steel I-Beam Substructure | Main load-bearing frame | Galvanized steel / Aluminum |
| Locking Cover Cap | Covers lock joint for waterproofing | Aluminum / PC |
| EPDM Sealing Gasket | End and joint sealing | EPDM rubber |
| End Closure Tape | Seals panel ends against dust/insects | Aluminum foil / EPDM |
| Sliding Fasteners | Fix panels, allow thermal movement | Stainless steel / Aluminum |
Note: The U-Lock system is sold as a complete roofing solution, not individual sheets. All components work together to ensure leak-proof performance and long service life.
Physical Properties
| Property | Value |
| UV Protection | Co-extruded on both sides, 30–50 microns |
| Fire Rating | B1 (GB 8624) / UL94 V-2 |
| Operating Temperature | -40°C to +120°C |
| Thermal Expansion | ~0.065mm/m·°C (expansion gaps must be provided) |
| Impact Strength | 200+ times stronger than glass (IK10+) |
| Wind Load Resistance | ≥2.0kPa (≥3.0kPa for double-hook) |
| Snow Load Capacity | ≥1.0 kN/m² |
| Self Weight | 1.8 – 4.5 kg/m² (depending on thickness) |
| Service Life | ≥10 years (outdoor, with UV protection) |
Cold Bending
| Feature | Detail |
| Cold Bend Radius | 3m – 8m (depending on thickness) |
| Hot Bend | Available for tighter radii on request |
Applications
Greenhouses: The leak-proof design and excellent light transmission make U-Lock sheets ideal for commercial and hobby greenhouses. The interlocking system ensures no water leaks even during heavy rain, while the diffused light transmission creates optimal growing conditions.
Carports & Patio Covers: Create weatherproof parking and outdoor living spaces with the U-Lock system. The screw-free design provides a clean, professional appearance while ensuring long-term leak protection.
Industrial Roofing: For factory roofs, warehouse skylights, and workshop roofing, U-Lock panels offer fast installation across large spans with minimal maintenance requirements.
Swimming Pool Enclosures: The UV-protected, corrosion-resistant panels are perfect for pool enclosures where humidity and chemical exposure would degrade metal roofing over time.
Agricultural Buildings: Livestock shelters, storage buildings, and equipment sheds benefit from the U-Lock system’s durability, thermal insulation, and fast installation.
Why Choose Jietai U-Lock Sheets?
As a factory-direct manufacturer, Jietai delivers the highest quality U-Lock polycarbonate sheets at competitive prices. Our U-Lock system has been rigorously tested for water tightness, UV resistance, and structural integrity. With over 15 years of experience in polycarbonate manufacturing, we provide technical support, custom sizing, and fast delivery nationwide and internationally.
Contact our team for samples, technical specifications, or a quote for your next project.
