DAP Bondex® Concrete patcher and resurfacer is a fast-setting polymer fortified Portland cement patch. It is an economical product for the repairs of cracks, chips and breaks in concrete and masonry. Its professional strength formula adheres to concrete, brick, stone, stucco, wood subfloors and other clean masonry surfaces. When mixed properly, this product provides a surface that resists cracking or breaking up. It dries hard to a concrete gray color and may be used indoors and out, above and below grade.