Trailer manufacturers are constantly looking for ways to improve durability, appearance, and long-term performance without adding unnecessary weight. While aluminum has long been the standard for trailer siding, its limitations (especially oil canning) have led many manufacturers to explore better alternatives.

PolyCor™ AP is a high-performance composite trailer siding panel engineered specifically to replace traditional aluminum. Developed and distributed exclusively by Piedmont Plastics, it delivers a smooth, stable, and long-lasting exterior for cargo trailers, enclosed trailers, and specialty vehicles.

Unlike aluminum or lower-quality composite panels, PolyCor AP is structurally designed to resist oil canning and maintain a clean, flat appearance, even in demanding environments and fluctuating temperatures.

PolyCor AP: The Chosen Material For Trailer Siding

PolyCor AP is part of the PolyCor™ product family, a line of engineered composite materials created for trailer manufacturing applications. It combines lightweight construction with structural stability, helping manufacturers improve both performance and aesthetics.

For builders seeking a reliable alternative to aluminum trailer siding, PolyCor AP provides a balance of strength, durability, and visual consistency that traditional materials often cannot match. Engineered specifically for cargo trailers, enclosed trailers, and specialty vehicles, it provides a smooth, stable, and durable exterior that resists oil canning.

Unlike aluminum and lower-quality composite panels, PolyCor AP maintains a clean, flat appearance even in extreme temperatures. Its light weight helps improve towing efficiency while delivering the structural stability needed for long-term performance.

Common Applications

PolyCor AP is designed for use across multiple trailer components, including:

• Exterior siding panels

• Interior wall panels

• Trailer ceilings

• Cabinet surfaces

Why PolyCor AP Performs Better Than Aluminum

While aluminum remains widely used, PolyCor AP delivers clear advantages for modern trailer manufacturing, especially as lower-quality composite materials enter the market.

Oil Canning Resistance

PolyCor AP is engineered to prevent waviness and distortion, ensuring a consistently smooth surface that supports clean graphics and professional branding.

Lightweight and Structurally Stable

Its lightweight construction improves towing efficiency and payload capacity while maintaining rigidity and panel shape.

Waterproof and Chemically Resistant

PolyCor AP protects against moisture intrusion and resists exposure to oils, cleaners, and harsh environments.

Reduced Road Noise

The composite structure helps dampen vibration and sound, resulting in a quieter ride.

Easy to Maintain

A durable polyester paint coating makes PolyCor AP easy to clean and ideal for wraps, decals, and branding.

If It’s Not Piedmont, It’s Not PolyCor

PolyCor AP is available exclusively through Piedmont Plastics, ensuring:

• Consistent, high-quality material performance

• Reliable supply through a North American distribution network

• Access to technical expertise for trailer applications

• Protection from imitation or lower-quality composite materials

As part of the PolyCor™ family, it can also be paired with materials for interior panels, ceilings, and cabinetry.

Why Choose PolyCor AP for Trailer Siding?

PolyCor AP offers a modern alternative to traditional aluminum siding. With its resistance to oil canning, lightweight construction, durability, and smooth finish, it helps manufacturers build trailers that perform better and maintain their appearance over time.

Get in touch with our experts today to learn more or request a quote for your next trailer project!