Any idea what this is called

[atnorman]

Hello everyone. Been searching for over an hour to find name/reference to the plastic material that covers the area under the overhang on my 5th wheel. I'm repairing the area around the front storage compartment door (replacing that door too). The vinyl sheeting that surrounds that door and curves up under the overhang, stops just short of the hitch. It's about 3mm thick, white surface backed by gray material. Any help on what it is called and where I can buy a piece about 5 ft. long, 6 inches wide to patch in. I'd appreciate it.

[Notanlines]

It is called Filon, google for a good price