I believe all manufactures have been using EPDM rubber for quite some time now. So I would bet that is what you have. Some of the newer units have TPO roofing which is a similar product. A friend has a unit with TPO roofing and it seams less flexible and has a texture to it.
EPDM rubber is used to roof a lot or commercial buildings and lasts 20 years+
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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