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.

• Alloy 3105-H14: 20 % stronger than 3003, excellent flatness & formability.

• Architectural-grade polyester coating: 2000 h salt-spray, 30-year colour & chalking warranty.

• 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:                                                  

Advantages

Core Benefits:

Case Studies  

1. Shanghai Tower Curtain Wall Back Panels

   • 1.2 mm RAL 7035 gray polyester-coated 3105 sheets

   • 632 m height, zero colour change after 10 years

2. One Vanderbilt New York Ventilated Façade

   • 1.2 mm light-gray coated back trays

   • NYC winter salt → still uniform after 5 years

3. The Shard London Rain-Screen System

   • 1.2 mm RAL 7040 window-gray back panels

   • 60 % faster install, perfect ventilation

4. Dubai Mall Expansion Curtain Wall

   • 1.2 mm custom gray polyester panels

   • 50 °C desert → zero chalking after 8 years

International Applications

• Curtain wall systems: Schüco, Reynaers, Alucobond, Alpolic

• High-rise: Shanghai Tower, One Vanderbilt NYC, The Shard London

• Commercial: IKEA, Walmart, Amazon fulfillment centers

Mega Trends

• 1.0 mm ultra-thin for lighter high-rise systems

• Cool-gray pigment for lower heat absorption

• Digital-print textures on gray base

• 97 % recycled 3105 with blockchain CO₂ passport

Upcoming Applications

• Kinetic ventilated façade back panels

• Floating city building curtain walls

• Lunar habitat pressure back panels

• 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 

E:gavin@cnchangsong.com