Aluminum Alloy 3105 Pre-painted Aluminum Coil for Rain Gutters | Thickness 0.6–1.0 mm | Width 200–600 mm | Double-side Lacquered

Introduction                                                

The 0.6–1.0 mm 3105 pre-painted aluminum coil with double-side lacquer and anti-scratch surface is currently the preferred mid-to-premium alloy worldwide for seamless rain gutters, K-style / box gutters, half-round gutters, downspouts, gutter guards, elbows and accessories — especially in regions with moderate-to-high rainfall, UV exposure or occasional salt air.

Compared to 3003 (softer) or 5052 (stronger but 20–40% more expensive), 3105 offers the best balance for modern gutter manufacturing:

Mn alloying → ~20% higher strength than 3003 → better dent & impact resistance from hail / falling branches

Outstanding roll-forming & seam-lock performance

Very good corrosion resistance for most climates (inland, urban, moderate coastal)

Cost-effective upgrade from 3003 while delivering 25–30 year real-world service life

Coating system:Double-side polyester (PE) lacquer: 20–25 μm per side,Anti-scratch nano topcoat (optional on exterior side),Standard colors: RAL 9010 pure white, RAL 9006 white aluminum, RAL 7035 light gray, RAL 9002 grey white, brown, black,Warranty: 25–30 years fade (ΔE ≤3), chalking & film integrity (inland/moderate climate)

Product Parameters:                                                  

Advantages

Core Benefits:

Case Studies  

1.Florida Coastal Residential Gutter Replacement (USA)

Thickness: 0.8 mm 3003 PE RAL 9010 white

Environment: high humidity + occasional salt air

Result: zero rust after 3 years, clean appearance, 25-year warranty

2.Sydney Suburban & Coastal Home Gutters (Australia)

Thickness: 0.9 mm 3003 PE light gray

Environment: high UV + salt spray exposure

Result: no chalking/fading, excellent seam integrity

3.Dubai Villa & Townhouse Rainwater Systems (UAE)

Thickness: 1.0 mm 3003 PE RAL 9006 white aluminum

Environment: extreme UV + sand/dust abrasion

Result: reflective surface reduces heat gain, no degradation

4.UK & Ireland Replacement Gutters (Europe)

Thickness: 0.7 mm 3003 PE brown

Environment: frequent rain + occasional acid rain

Result: 30% lighter than old steel, no repainting needed

5.Malaysia Commercial Warehouse & Factory Drainage

Thickness: 1.2 mm 3003 PE RAL 7035 light gray

Environment: tropical humidity + heavy rainfall

Result: zero leaks, 25-year color stability forecast

International Applications

Seamless K-style & half-round rain gutters:residential & light commercial

Downspouts, elbows, miters, outlets & gutter accessories

Gutter guards & leaf protection systems

Commercial & agricultural building drainage:warehouses, barns, greenhouses

Moderate coastal & urban retrofits:replacement of rusted steel gutters

Mega Trends

Thinner gauges (0.4–0.8 mm) for lightweight modular & green building drainage

Cool colors & high-TSR coatings:reducing urban heat island effect

Anti-clog & self-cleaning gutter systems:nano coatings + leaf guards

Highly recycled content 3003 coils with full traceability & CO₂ passport

Integrated gutter-solar solutions:color-matched thin-film solar gutters

Extreme weather:35–40 year warranty common in coastal & high-rain regions

Upcoming Applications

Floating city modular rainwater collection gutters

Mars habitat lightweight durable drainage systems

High-speed rail station curved metallic guttering

Zero-energy building integrated rainwater & solar gutter systems    

FAQ (USA/Europe/Middle East/Asia Buyers)

Q1: Why choose 3003 over 1060 or 5052 for rain gutters?

A: 3003 provides 20–30% higher strength than 1060 (better resistance to hail, falling branches & foot traffic) at only slightly higher cost. 5052 is marine-grade but 20–40% more expensive and usually unnecessary unless in extreme coastal/salt-spray locations. 3003 is the industry sweet spot for most residential & light commercial gutters.

Q2: What does the 25–30 year warranty on PE coating actually cover?

A: Fade (ΔE ≤3), chalking, gloss retention & film integrity (no peeling/cracking) under normal inland/moderate climate exposure. Full warranty certificate & third-party exposure data provided.

Q3: Can you provide salt-spray test report & performance data for moderate coastal areas?

A: Yes — 3000–5000 h neutral + acetic salt spray (ISO 9227/ASTM B117) passed. Moderate coastal & humidity exposure data available.

Q4: Minimum order quantity & lead time for custom colors?

A: MOQ 3–5tons (depending on color); standard white/gray/brown 15–25 days; custom RAL match 25–35 days. Sample coils free with freight collect.

Q5: How does 3003 PE coated perform in high-rainfall / tropical climates?

A: Very good — excellent water shedding, no chalking/fading after 25 years in 90%+ humidity environments. Tropical & heavy-rainfall exposure data available.

Q6: Is 3003 suitable for seamless gutter machines without paint cracking or oil-canning?

A: Yes — 3003 has excellent flatness & low thermal expansion. We recommend H24 temper + tension leveling. Seamless gutter samples & forming suggestions provided.

Call to Action                                                                                                        

Want rain gutters & downspouts that stay strong, beautiful & maintenance-free for 25–30 years?

Contact us to learn about 0.9 mm PE RAL 9010 white sample + 25-year warranty certificate + real gutter project reference package

24-hour rapid quote

Contact Dingang immediately — install gutters that outlast the weather!

T: 0086 13961220663 

E:gavin@cnchangsong.com