Comparison

FRP (Fiberglass)

Galvanized Steel

Aluminum-Faced Panel

Weight Reference

1.5mm ≈ 2.25–3.0 kg/m²

0.5mm ≈ 3.93 kg/m²

0.5–0.8mm ≈ 1.35–2.16 kg/m² (lightest of the three)

Corrosion Resistance

Non-corrosive, maintenance-free for life; electrically insulating, so contact with dissimilar metals (e.g. aluminum door frames, hardware) will not trigger galvanic corrosion

Relies on zinc coating; cut edges, welds, and impact points corrode easily; as a standard steel, contact with dissimilar metals (e.g. aluminum door frames, hardware) also carries galvanic corrosion risk, and rusting accelerates once the zinc layer is damaged

Aluminum itself resists oxidation, but as a reactive metal it easily becomes the "sacrificial anode" in galvanic corrosion when in contact with dissimilar metals (e.g. steel hardware, screws, connectors), leading to localized oxidation after scratches

Thermal Insulation

(W/m·K = the amount of heat (in watts) passing through a 1-meter-thick material per second given a temperature difference of 1 K between the two sides)

Low thermal conductivity (0.2–0.3 W/m·K), good insulation performance from the skin itself

High thermal conductivity (45–50 W/m·K), prone to condensation and noticeable thermal bridging

High thermal conductivity (≈237 W/m·K), the skin itself insulates poorly; overall insulation depends on the core material

Wide-format and Surface

Up to 3.2m;

Extra-wide seamless panels:smooth and waterproof;

Finished directly in color/texture,eliminating post-painting and reducing maintenance cost

Generally 1m-1.25m;

More joints on truck body;

Generally below 2.6m

Repairability

Localized resin repair; flexible for minor damage

Dents require sheet metal repair or full panel replacement

Minor dents can be tapped out or patched; moderate repair difficulty

Fatigue/Vibration Stability

Good fatigue resistance, less prone to cracking under long-term vibration

Prone to metal fatigue and cracking under long-term vibration

Good, and unlike steel does not rust or crack easily

Sound Insulation

Relatively good

Weaker, noticeable metallic sound transmission

Moderate, better than steel but weaker than FRP

Cost

Higher than that of galvanized steel sheet; compared to aluminum, it depends on the specific product

Typically the lowest of the three

Higher than that of galvanized steel sheet; compared to FRP, it depends on the specific product

Best-fit Applications

Focuses on corrosion resistance, thermal insulation, food hygiene and safety, and energy efficiency;

High-humidity and high-salinity regions / Cold-chain insulated vehicles / Pharmaceutical and food transport / Electric commercial vehicles

Cost-focused;

Economical/budget-sensitive

Suitable for markets prioritizing load-bearing capacity, impact resistance, and structural fabrication flexibility, and where the manufacturing, supply chain, and maintenance ecosystems for aluminum panels are mature;

Suitable for vehicles requiring frequent modification or for extra-large trailers.