Aluminum Alloy 3105 Aluminum Sheet for Curtain Wall Back Panel Application (1.2 mm | Custom Width | Gray Polyester Coating)
Introduction
The 3105 gray polyester-coated aluminum sheet for curtain wall back panel (1.2 mm thickness, 600–1650 mm customizable width, 25 μm high-durability RAL 7035/7040 gray polyester coating) is the global construction industry's most reliable and cost-effective material for durable, flat and aesthetic curtain wall rear ventilation panels and back trays.
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Alloy 3105-H14: 20 % stronger than 3003, excellent flatness & formability.
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Architectural-grade polyester coating: 2000 h salt-spray, 30-year colour & chalking warranty.
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Custom width + protective film: ready for cassette fabrication, bending or honeycomb bonding.
Result: back panels that stay uniform gray for 30+ years, provide perfect ventilation, and install 60 % faster than painted steel or composite alternatives.
Product Parameters:
| Product |
Aluminum Alloy 3105 Aluminum Sheet for Curtain Wall Back Panel Application (1.2 mm | Custom Width | Gray Polyester Coating) |
| Thickness | 0.001mm-2.5mm |
| Width | 600-1650mm |
| Materia | 3105 |
| Temper | O, H12, H14, H16, H18, H24, H26, H32, H34, etc |
| Inner Diameter | 405mm,505mm,150mm,etc. |
| Color | RAL, Pantone Color Or As Alient's Demand |
| Coating thickness | PVDF Paint Coating: Not Less Than 25um |
| PE Paint Coating : Not Less Than 18um | |
| Packing | Export Standard Wooden Pallets (Eye To Wall,Eye To Sky) |
| Payment Terms | L/C at sight or 30% T/T in advance as deposit, and 70% balance against the B/L copy. |
| MOQ | 1 Ton Per Specification |
| Delivery Time | Within 30 Days |
| Loading Port | Shanghai Port |
| Application |
Curtain Wall Back Panel Application |
Advantages
Core Benefits:
| Advantage | Detailed description |
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30-Year Uniform Gray |
2000 h salt-spray + UV-stable polyester. |
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70 % Lighter |
1.2 mm Al vs 2.0 mm steel → 2.5 kg/m² saved. |
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Perfect Flatness |
No waves after cassette forming. |
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60 % Faster Install |
Pre-coated → no site painting. |
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Ventilation & Drainage |
Ideal for rain-screen back trays. |
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ECO Friendly |
96 % lower CO₂ vs steel back panels. |
Case Studies
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Shanghai Tower Curtain Wall Back Panels
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1.2 mm RAL 7035 gray polyester-coated 3105 sheets
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632 m height, zero colour change after 10 years
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One Vanderbilt New York Ventilated Façade
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1.2 mm light-gray coated back trays
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NYC winter salt → still uniform after 5 years
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The Shard London Rain-Screen System
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1.2 mm RAL 7040 window-gray back panels
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60 % faster install, perfect ventilation
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Dubai Mall Expansion Curtain Wall
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1.2 mm custom gray polyester panels
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50 °C desert → zero chalking after 8 years
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International Applications
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Curtain wall systems: Schüco, Reynaers, Alucobond, Alpolic
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High-rise: Shanghai Tower, One Vanderbilt NYC, The Shard London
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Commercial: IKEA, Walmart, Amazon fulfillment centers
Mega Trends
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1.0 mm ultra-thin for lighter high-rise systems
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Cool-gray pigment for lower heat absorption
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Digital-print textures on gray base
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97 % recycled 3105 with blockchain CO₂ passport
Upcoming Applications
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Kinetic ventilated façade back panels
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Floating city building curtain walls
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Lunar habitat pressure back panels
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Mars base lightweight cladding systems
Call to Action
Build flawless façades for 30 years – ACT NOW!
→Contact us to learn about 1.2 mm RAL 7035 gray sample + 30-year warranty & Shanghai Tower reference.
24 h quote |
Contact US TODAY – let every back panel stay perfect forever!
T: 0086 13961220663
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.