Probably TPO. Take off the interior garnish of one of your ceiling vents and there will be a scrap hanging down inside. Feel it, and look at it. If it feels like plastic and doesn't stretch when you pull on it, you have TPO. If it feels rubbery and stretches a bit when you tug on it you have some form of EPDM aka rubber.
__________________ There is madness to my methods
2015 Coleman CM16FBS(traded) 2016 Concord 300DS
2015 Ford Fusion Hybrid following along