Recent Updates, Longevity & Long Term Performance Laboratory Evaluation of EPDM Roof Membranes International Symposium on RoofingJanuary 1, 1991Brian D. Gish and Kathleen P. Lusardi Download File (2 MB pdf) Single-ply rubber sheets, based upon ethylene propylene diene terpolymers (EPDM), have steadily increased in usage for roof membranes over the past 20 years. All Resources Next →