This is a White Rigid Divider for Wall and Ceiling Panels. They are used to finish off the seams of the wall panels without using batten strips or seam tape. Comes in 8 Foot Sticks and is 3/16". They have been used on RV's and Motorhomes such as Fleetwood, Winnebago, ForestRiver, Thor, Skyline, Monaco etc.
PHOTO: shows Clarsbad paneling with P95 White Rigid Divider