SAND MIX W/CEMENT 80-LB. SAKRE. This 80lb Sakrete Sand Mix can help your infill project much more easily and efficiently. It can be used to repair cracks and bed surfaces for brick and slate and as a cover to make damaged concrete surfaces look new again. The 80lb size makes it an ideal choice for large projects. All these features, this product makes all crack repair jobs, road surfaces, concrete and masonry easy to repair. Besides being resistant and durable.