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The paving has signs of white marks on the surface?

April 26, 2017marks Paving signs white

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The paving has signs of white marks on the surface?

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A. This is a natural phenomenon that occurs in all cement based product, it is called Efflorescence. This is a by-product of the curing process. It appears more on darker colours than lighter natural colours. It is not permanent and will disappear with time.