CURING WHITE MD 445 5GAL PAIL. This product is a high quality concrete curing compound made specifically for highways. It forms a thin membrane when brushed or sprayed onto freshly finished concrete surfaces. It is specifically designed to meet certain state road specifications. In addition, it retains more than 95 percent of the sample water present in the concrete for 3 days, while allowing for maximum cure with very little labor and material expenditure.