A method, system, apparatus, or device to protect a sink or a cabinet. An apparatus may include a substrate, a guard wall, a first fastening wall, and a second fastening wall. The substrate may extend along a plane and include a top surface and a bottom surface. The guard wall may extend along at least part of a perimeter of the substrate. The first fastening wall may extend downwardly from a first edge of the substrate. The second fastening wall may extend downwardly from a second edge of the substrate.