... an almost unlimited chemical resistance and etc. TECHNICAL DATA MATERIAL:100%expanded PTFE (e PTFE)with multidirectionally oriented fibril structure. CHEMICAL ... and can be stored indefinitely. KEY FEATURES:1,Made from 100% expanded PTFE(ePTFE)2,High chemical and thermal resistnce3, ... in the pH range 0—146,Highly conformable to the sealing surface7,Straightforward installation 100% PTFE seal sheet