Many people hold that the sandstone is solid stone , so they don't need maintenance. That is not the case. Each have their own weakness, and the weakness of sandstone is porous. This porous structure makes the water easy to penetrate. Once the sandstone absorbed moisture, it will lead that the color change and coloring in chemical. These spots will become an integral part of sandstone. If you want to keep the beautiful appearance of sandstone, luster, texture and practical, then you should take special measures to care them.
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