Stucco can be used to repair and conceal minor wall cracks, it is essential to note that it may not be a permanent solution for structural issues. Stucco is a versatile material that can be applied to various surfaces, including exterior walls, to provide a seamless and visually appealing finish. In the case of hairline cracks or small imperfections, applying stucco may help mask these flaws and contribute to a smoother appearance.