PermaWrap susceptible to microbial attack such as Microbiologically Influenced Corrosion (MIC)?

Although MIC is a serious problem with metal, they pose no difficulty with FRP materials because bacteria has no appetite for high molecular weight polymers. Due to this known fact, the FRP Industry has never seen any evidence of MIC corrosion. At times people have been concerned with fungus because some thermoplastics can be degraded by fungus.

With FRP, there has never been any proof that this happens. In cases where fungus attack was suspected, a close examination reveals that the apparent fungus growth is really on soil particles, which are physically adhering to exhume FRP. Gasoline tanks buried in sulfate containing soils are virtually unaffected after thirty years or so, while metal tanks under the same conditions would be severely corroded by sulfate reducing bacteria.

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