Salt type marks on new block paving driveway - how do I get rid of them and why are they there?
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It is called efflorescence, it is common to all new cement products. If you can wait a month or 2 it will stop as the the blocks age. It doesnt hurt anything and will wash off in time. If you pressure wash it now, it will come back. It is a natural process and will cease soon. It will not effect the color of the blocks.
Brick acid . get it from builders merchants
It's called efflorescence and is minerals coming out of the blocks from moisture. This often happens in basement walls. It can be brushed off with a wire brush when dry.
this will not be salt marks more likely of the cement that was put down the joints get some brick acid but read the instructions carfully and do a test in a corner or out of the way place
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