PVDF Coated Aluminum Profiles

What is PVDF for Extruded Profiles?

PVDF (polyvinylidene fluoride) is a fluoropolymer coating system applied to extruded aluminum profiles via multi-coat spray and high-temperature bake. Using architectural-grade PVDF resin (typically 70% fluoropolymer per Kynar 500/Hylar 5000 specifications), it forms a dense, UV-stable, and corrosion-resistant finish tailored to complex profile geometries.

Advantages of PVDF Coated Aluminum Extrusions

Exceptional weatherability (20–30+ years): PVDF maintains color and gloss under strong UV, rain, salt spray, and thermal cycling, making it ideal for façades and exposed frames; proven field performance in coastal and desert climates shows low chalking and minimal gloss loss, supporting long warranties and extending repaint cycles.

Superior corrosion protection: The dense fluoropolymer barrier blocks moisture, chlorides, and industrial pollutants, and when paired with proper conversion coating and primer it resists underfilm corrosion at edges and joints; this is especially valuable for hollow and intricate extrusions where crevices can trap contaminants over time.

Outstanding color and fade resistance: Strong C–F bonds and UV-stable pigments deliver ultra-low chalking and minimal ΔE, even for dark, saturated, or metallic/mica colors, ensuring consistent appearance across orientations and elevations; this reduces replacements due to mismatch and preserves the original design intent.

Low dirt pickup and easy cleaning: The low-surface-energy finish sheds dust, soot, and grime, so routine rinsing with water and neutral detergent typically restores appearance; in polluted urban or coastal zones, reduced soiling and easier maintenance mean fewer cleaning cycles and lower access costs.

Flexibility and durability on complex profiles: PVDF retains flexibility after cure to accommodate expansion and contraction of long, thin-wall extrusions without cracking at corners or sharp radii, and it shows good mar/abrasion resistance during fabrication and installation when properly cured, reducing rework and touch-up on site.

PVDF Coating Process

Pretreatment for complex sections: alkaline degrease → rinse → conversion coating (chromate or chromate-free) → dry; special attention to hollows/voids and drainage to avoid residue.

Primer: epoxy or polyester primer to boost adhesion and edge corrosion resistance.

PVDF topcoat: controlled spray angles/racking to cover deep channels, sharp edges, and backwalls.

Optional clearcoat: increases abrasion resistance and fine-tunes gloss/self-cleaning.

Cure: typically around 200°C with time/temperature verified on heavy/thin sections to avoid under- or over-bake.

QA for profiles: film thickness mapping on edges, corners, recesses; cross-hatch adhesion, MEK rubs, gloss and color ΔE checks.

PVDF coating Film Further

Total DFT: 25–35 μm typical; 35–45 μm for severe exterior exposure.

Corner/thin-wall coverage: optimize gun setup and line speed to avoid thin spots and runs on sharp radii and narrow webs.

Appearance: matte/semi-gloss/high-gloss; metallic/mica orientations controlled for uniform look across long profiles.

Comparison with Other Surface Finishes

Item	PVDF Coating	Anodizing	Polyester Powder	Electrophoretic Coating (E-coat)
Outdoor durability	Excellent, 20–30+ years	Very good; dyed colors may fade	Good, below PVDF in high UV	Moderate; best indoors
UV/fade resistance	Excellent	Natural anodize good; dyed average	Medium to good	Limited
Corrosion resistance	Excellent (with pretreatment + primer)	Very good; needs good sealing in marine	Good	Good; needs topcoat for harsh exterior
Cleaning/soiling	Low dirt pickup, easy to clean	Hard surface, can stain	Average	Very smooth; easy indoors
Mechanics/edge coverage	Flexible; resists corner cracking	Hard; damage is visible	Thick film; great edge coverage	Thin, very smooth
Appearance options	Widest color/gloss range	Strong metallic look; limited colors	Many colors; textures possible	Very smooth; fewer colors
Batch consistency	High (manage metallic orientation)	Sensitive to alloy/process	High	High
Complex profiles	Good; needs spray angle/racking control	Inner cavities not treated	Very good	Very good (coats internals)
Film thickness	25–35 μm	10–20 μm	60–120 μm	10–25 μm
Initial cost	High	Medium–high	Low–medium	Medium
Lifecycle cost	Low	Medium	Medium to higher (exterior)	Medium–high (exterior)
Best use cases	Coastal/high-UV façades, long warranties	Metallic look, abrasion-resistant parts	Cost-effective façades, inland	Interior parts, complex hollows

About HTS-ALU

HTS New Materials (Jiangxi, China) is a leading aluminum extrusion manufacturer with 40+ advanced lines and presses up to 6,000 tons. We supply profiles for construction, industrial uses, and premium doors/windows, including thermal-break profiles.

Capabilities include anodizing, powder coating, fluorocarbon coating, and wood-grain transfer. We also offer end-to-end machining and fabrication: CNC, milling, punching, drilling, threading, precision cutting, welding, and assembly—delivering ready-to-use, project-specific solutions.

Hot-Selling Products

Custom Extrusion Steps

Share your CAD/STEP files or a physical sample.
We create manufacturing drawings.
You review and approve the drawings.
We manufacture the extrusion die.
We run a trial extrusion.
You validate and sign off the samples.
We begin mass production.
Typical extrusion lead time is about 15 days.
Extra time is added for finishing or machining.
We perform in-process inspections.
We conduct final inspections before shipment.
We protect each profile to prevent abrasion.
We pack per your requirements.
We arrange shipment by sea, air, rail, or multimodal.

Alloys for Extruded Profiles

Aluminum Profile Weight per Meter

Cross-sectional area

Density assumed: 2720 kg/m³ (2.72 g/cm³).
Formula: W(kg/m) = A(mm²) × 0.00272 or A(cm²) × 0.272

Weight: —

Tip: For other densities, adjust the factor: kg/m = A(mm²) × (density kg/m³) × 1e-6.