In addition to my slide seals question- Roof question

If you have an EPDM rubber roof, this is what the manufacturer states...

No special coating or other surface treatment is required. General maintenance in the form of good housekeeping should periodically be performed to remove debris and leaves, and to investigate the performance of other components.

http://www.epdmroofs.org/what-is-epdm/faqs/general-questions#does