Is there such a thing...??

If you are repairing or looking to upgrade an older roof. There are companies that strip off the TPO/EPDM roofs, check all the wood and cover that with a material similar to bed-liner. They spray over the seams and around each opening.

I have looked at the web sites and it looks promising for a zero-maintenance roof.

Peterson Industries (Excel 5th wheels) offered Rhino RV Coating as an option for a short while before they went out of business.