Treatments on EPDM rubber roofing is like polishing your sneakers. It not only does no GOOD it can easily do harm to your roof. They are DESIGNED to slough off rubber as they wear and they are almost always WARRANTED for at least 10 years and as long as 15 years (depending on the manufacturer). It is extremely rare for a rubber roof to ever LEAK within that warranty period. Nearly 100% of leaks reported are caulking or physical damage issues and treatment will do nothing to prevent either of these things.
2011 F-150 HD Ecoboost 3.5 V6. 2550 payload, 17,100 GCVWR -
2004 F-150 HD (Traded after 80,000 towing miles)
2007 Rockwood 8314SS 34' travel trailer
US Govt survey shows three out of four people make up 75% of the total population