Redwoods don't have a Rubber Roof, they are TPO (Thermoplastic polyolefin). Does cause the white streaks like EDPM (Ethylene Propylene Diene Monomer, a synthetic rubber).
TPO is the current "Go To" roofing material.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top