I was on a 22 year old .045 EPDM Firestone roof today. Glued seams and all. Looks fantastic. It belongs to an old roofer that retired a couple of years ago. These guys did top-notch work. He still swears by BUR.
Best thing about the whole story is this guy has hired me to put on a metal standing seam roof on the mansard. Its 10 sq. straight run with one hip. I priced it at 9K. He hired me on the spot without taking any other bids. I had never met the guy before, but he said he has heard about me and didn't want anybody else on his roof. My head grew ten sizes bigger immediatly. This old-timer is twice my age and I have never had such a compliment.