uPVC stands for unplasticized polyvinyl chloride. uPVC and PVC are different. The plasticized PVC is made by adding a plasticizer additive in its production process to make it flexible or easily bent, example for this type of PVC is the hose, the electric cable, shoe sole, etc. uPVC in contrary, there is no plasticizer additive is added in the making of it. As a result, the product made from uPVC is rigid, and doesn’t flex.