Durable laminated PTFE membranes are unaffected by even the most corrosive compounds, including concentrated acids, alkaline, and propellants. Membranes withstand temperatures from 100 to 130°c (148 to 266°f). use these hydrophobic membranes for sterile Venting and filtration of gas, air steams, and organic solvents. Preset with Acetone or methanol for aqueous solutions.