Perma-Liner in Philadelphia. A commercial facility in Philadelphia was about to have Perma-Liner pipe lining completed on some of their hard-to-reach deteriorated pipes. The Philadelphia owner of the commercial facility began researching different types of liner material Perma-Liner manufactured and wanted to know what type of Perma-Liner material was going to be used in their Philadelphia facility. Due to the multiple hard 90 degree bends the contractor was faced with, it was decided that the Perma-Liner “Flex Liner” would be the optimal material for this specific Philadelphia project. If you have questions on any of the Perma-Liner products, call us at any time!