High-grade rigid PVC plaster groove profile engineered to create crisp, clean architectural reveal lines and controlled shadow gaps on plastered walls, ceilings, and exterior facades. Designed to serve as an aesthetic visual divide while functioning as a control joint to accommodate minor thermal expansion and eliminate irregular surface cracking. Extruded from heavy-duty, UV-stabilized unplasticized polyvinyl chloride (uPVC) that will not rust, rot, or corrode, ensuring permanent edge definition that can be finished with standard interior or exterior paints.