EverGuard TPO Utility Flashing Membrane provides roofing contractors with an easy-to-install factory-built detail. EverGuard Utility Flashing Membrane is constructed using GAF's proven, durable EverGuard TPO. This accessory is used to strip-in coated metal flanges and at areas that require a reinforced membrane for flashing. The membrane is EverGuard® TPO reinforced, so it's durable and versatile.