“Vinyl” is short for polyvinyl chloride, also called PVC, a plastic material widely used for applications that demand durability. The prefix “poly” refers to the fact that the molecules are chemically linked to one another in long chains, called polymers. Although PVC is the principal ingredient in vinyl fencing, other ingredients are added to give the fencing desirable properties. For example, special ingredients, called impact modifiers, are added to improve the impact resistance of fencing. Titanium dioxide (TiO2) is a white pigment that is added for long-term resistance to ultraviolet (UV) light, a component of sunlight that tends to discolor and embrittle most substances that are exposed to sunlight over long periods of time. DuraMax specially formulates its vinyl to withstand the sunlight typically experienced in the Southwestern states, which is harsher than in any other part of the country. It does this by using a higher proportion of TiO2 as well as adding special UV inhibitors and modifiers. The resulting formula, called DuraResin, unique to DuraMax products, is the only one that has been engineered as the best product in the market today!