Trusscore 1/2" J Trim is used on Wall&CeilingBoard; projects to complete corners, wall perimeters and trim around windows & doors. , Trusscore Wall&CeilingBoard; is designed with a high-strength polymer formulation and engineered to be the perfect alternative to traditional FRP and drywall systems. The tongue & groove interlocking system makes installation quick and easy, and the unique truss design provides industry leading strength and durability. When you need a smooth finish that is easy to clean, low-maintenance, and abuse-resistant, Trusscore Wall&CeilingBoard; has your project covered.