2007-06-24 04:34:46 · 4 answers · asked by melly 4 in Home & Garden ➔ Maintenance & Repairs
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.
2007-06-24 05:04:17 · answer #1 · answered by bill43352003 2 · 1⤊ 0⤋
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
2007-06-24 13:49:41 · answer #2 · answered by capcave2002 4 · 0⤊ 0⤋
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.
2007-06-24 11:53:59 · answer #3 · answered by sensible_man 7 · 1⤊ 0⤋
Brick acid . get it from builders merchants
2007-06-24 11:42:16 · answer #4 · answered by Anonymous · 0⤊ 0⤋