RV Underside Covering Question

[TN Traveler]

What is the black, plastic like covering on the underside of my Cougar Fifth Wheel called?

[flybouy]

Coroplast ? looks like corrugated cardboard made from plastic?

[TN Traveler]

Thanks Marshall, I believe that is it

[NH_Bulldog]

Just to clarify, the coroplast (corrugated plastic) is typically on the lowest part of the underside of the trailer frame, enclosing the center section between the frame rails. The underside of the floor outside of the frame rails is typically covered with a black plastic fabric-like material called Darco.