Using bleach on a rubber RV roof is not recommended. Bleach or a homemade RV roof cleaner containing bleach can cause more problems such as cracks and bubbling in the rubber membrane and reduce the lifespan of your RV’s roof. Instead, always use a RV rubber roof cleaner that has been specifically formulated to work with rubber as this will keep your roof in good condition for longer, and also save you on potentially expensive repair bills.