temporary rubber roof repair ideas? 95 Fleetwood Elkhorn 11X

I really am at a loss as to why there isn't a product that can be painted over a rubber roof in good condition to renew the surface. I can buy elastomeric coating for my roof and it is made to go over all kinds of different types of roofs, why is an RV different? There has to be some product out there. My current one is the only RV I've had with a rubber roof and it's in good condition, but I can certainly understand the sentiment of this thread.