Originally Posted by Chateau_Nomad
Likely it's TPO. All that's required is keep it clean using mild detergent. Do not put waxes or any protective coating on it, as TPO is "self shedding" over it's lifetime. Frequent washing will help prevent black streaks on your motorhome sides caused by dirty rainwater runoff.
Seal any potential leaks with Dicor self-leveling lap sealant.
And use no petroleum products to clean. Don't use a pressure washer. Sealing surface maintenance and inspections should be annually at a minimum, semi annually is better. That means up on the roof and carefully inspect all seams and seals. Don't worry about having a pristine looking stain free roof. It's a roof not a kitchen counter.