ohns Manville's Micro-Flex® is a large diameter pipe and tank wrap that provides an alternative solution to pre-formed insulation. Our manufacturing process yields a fiber orientation that enhances both the compressive strength and thermal performance of the final product when compared to conventional pipe and tank insulation. Micro-Flex rolls can be cut to size on-the-job and are available with FSK or AP vapor retarder facing. It provides a single solution to a variety of field applications for the contractor and distributer.