What is it? UPVC stands for un-plasticized polyvinyl chloride. PVC is a common form of plastic which is light in weight. Poly Vinyl chloride can be made much softer and become more flexible by adding plasticizers. When no plasticizer is added into PVC, then it is called uPVC. The uPVC is also known as rigid PVC. The uPVC material is used in the construction of Energy Efficient Windows. It is the perfect material for the installation of windows. #UPVC is wrapped around galvani