(800) 984-1811 SALES@INTERSTATESP.COM POREX® VIRTEK PTFE MEMBRANES Advantages of Porex Virtek® PTFE Membranes Robust and durable sintered PTFE due to 3D matrix construction Naturally hydrophobic for waterproof venting Self-supporting membrane that is easy to handle and omni-directional UL-94 flammability and UL-746C weatherability listings