Polyvinyl chloride, (IUPAC Poly(chloroethanediyl)) commonly abbreviated PVC, is the third most widely used thermoplastic polymer after polyethylene and polypropylene.

Unplasticised polyvinyl chloride (abbreviated as uPVC) is a low maintenance material.
It is used in the construction industry. It is available in a variety of colors and finishes. The photo-effect wood finish of unplasticized  polyvinyl chloride is used in window frames and window sills as a substitute for painted wood. It is also used as a replacement for older windows which have been installed with a single glazing or while installing double glazing in a new building.

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