EPDM coating or Wal Mart EPDM I used a EPDM roll on coating from Home Depot (Henry brand)for a 1/3 of my roof repair. That was 10 years ago and still no leaks. Here in the Southwest 10 years of rain is not very much of a test but 10 years of sun is more than average :B
It is time to re-coat though since I have a few gouges in the material.