Inside-Out stocks FRP Panels from Glasteel/ Stabilit. The most common FRP panel is our white 4’x10′ sheet used in commercial bathrooms, restaurant bathrooms, car wash construction, kitchen remodels, restaurant remodels, and applications where owners need surface that’s easy to keep clean. We also keep gray FRP panels in the same size and have access to silver FRP panels, black FRP panels, ivory FRP panels, and many other colors. We stock all of the accessories making for easy installation as well: FRP inside corners, FRP outside corners, FRP dividers, & FRP adhesive.