Henry Tropi-cool is a good product, but I don't see any claim that it is compatible with EPDM rubber. I would call Henry Tech Support and ask before using it. I suspect their prep primer will be required over EPDM.
Whatever you choose, verify EPDM compatibility first. Otherwise you risk having it bubble up within a year or so.
I think you can get a roof coat made for RV EPDM roofing for about the same price, e.g. Kool Seal RV
https://www.rvupgradestore.com/Kool-...p/kool-rrt.htm