Sto Extended Full-Depth Repair Mortar with integral corrosion inhibitor is a single-component cement-based mortar for structurally repairing or overlaying deteriorated concrete. Use on horizontal surfaces for repairs deeper than 1.5 inches (38 mm). It has been preextended using kiln-dried uniform, pea gravel to allow for deeper applications. Its formula provides increased strength gain and improved performance for repair applications.