How do you prevent PVC from deteriorating from sunlight?

Using "sunlight resistant" PVC is the most effective way to prevent deterioration from sunlight. This type of PVC is specifically formulated to withstand UV radiation, which is a major cause of degradation in standard PVC materials. Sunlight can cause the chemical structure of PVC to break down over time, leading to brittleness, fading, and loss of structural integrity. Sunlight-resistant PVC is infused with additives that enhance its UV stability, ensuring it retains its properties and appearance longer when exposed to outdoor conditions.

While painting it could provide a temporary layer of protection from UV rays, it may not be a long-lasting solution as the paint can peel or fade over time. Encasing it in metal may protect it from direct exposure, but it might also be impractical for many applications and can lead to other issues like moisture retention. Applying a protective coat can offer some level of safeguarding but typically would not be as reliable as using sunlight-resistant materials from the start. Therefore, choosing sunlight-resistant PVC is the best option for long-term effectiveness in outdoor applications.