Profile: LINE-X Protective Coatings Oklahoma is specialized in truck bed protection. We offer Line-X spray-on truck bedliners. Our Line-X is a custom spray-on polyurethane bed liner that permanently seals out rust and corrosion. Our Line-X has the advantage of getting molded to every contour, providing a weather & water tight seal; resists most chemicals; dampens sound and vibration and is environmentally friendly.