Liquid Polycaprolactam
gtceu:polycaprolactam, from GregTech
14 recipes use this.
AssemblerMakes Nanocrack Regulated Self Humidifying Composite Material Membrane ElectrodeView recipe
AssemblerMakes Perfluorosulfonic Acid Polytetrafluoroethylene Copolymer Membrane ElectrodeView recipe