Manufacturing sales decreased 3.9% on the month in August, but mining sales were up 5.4%, the data showed.
By sector, sales of capital and durable goods fell 17.7% and 1% on the month, respectively, while sales of intermediate goods inched down 0.1%.
However, energy sales increased 4.5% in August compared with the previous month, while consumer goods sales advanced 1.5%, the data showed.
On an annual basis, industrial sales rose 4.7% in August, on higher sales in all sectors. Mining sales increased 6.3% in August compared with the same month of 2011, while manufacturing sales were up 4.7% on the year.
In January through August, Romanian industrial sales rose 3.4% on the year, again fueled by increases in all sectors.