At MVP, our goal is your satisfaction. That is why we offer lifetime warranties on our fencing and railing. Here is some Q&A about Vinyl: What is vinyl made of? The main ingredient in vinyl is PVC (polyvinyl chloride). Added to the mix is titanium dioxide, an ultraviolet inhibitor that prevents yellowing. In order to provide impact resistance and weatherability, controlled quantities of specialized components are also added to the blend. Will vinyl turn yellow? No. Yellowing and fading in vinyl products are due to the sun's ultraviolet rays. MVP's products contain 10 parts per 100 of titanium dioxide. This amount of titanium dioxide is like using SPF 40 sunscreen on your skin. It is more than sufficient to prevent damage from the sun's ultraviolet rays.