The economy “C” and Dock Guard co-extruded Profiles are made to exacting standards from Marine Grade PVC with UV Inhibitors and Fungicides. Ideal for light to medium duty applications, they will not crack or distort with temperature extremes and come in easy to install 6' (1.8m) lengths or 10' (3.0m) coils. It can be used on flat surfaces as well as on pilings.