Many patios lose their luster within years—warm wood tones fade to grey, elegant grays become patchy. This isn't just an aesthetic loss; it signals the failure of the material's protective layer. How do you preserve your patio's original color story? The key is the material's weather resistance, scientifically measured by xenon-arc aging tests and the ΔE*ab color difference value.

This test simulates years of harsh UV and climate exposure. The ΔE*ab value quantifies the degree of color change; a lower number indicates greater color stability. For example, ZaiAn ASA decking shows a color difference of ΔE*ab ≤ 2.4 after such testing (per ISO 4892-2:2013/Amd.1:2021). This is an exceptionally high standard, meaning the color shift is barely perceptible to the human eye.

This performance is achieved through advanced co-extrusion technology. The color is not a surface coat but is fused with the wear layer under high heat and pressure, ensuring the hue is solid, consistent, and wear-resistant. No matter how intense the sun, your chosen teak or smoke gray will remain vibrant and pure.
Therefore, when selecting outdoor flooring, checking its weathering test report and specific ΔE*ab value is a smart, long-term investment in the enduring beauty of your outdoor space.