Chris asks…I need to Know how to remove white calcium stains from dark brick and multi-colored flagstone?Mr. Thin Brick answers:Efflorescence is a white powdery substance that can often stain brick. These efflorescence brick stains are caused by deposit of salts. The mortar used to construct your brick wall has a fairly high amount of salt.
To clean efflorescence brick stains, use a stiff bristled brush and water. Scrub the area and the stain should clean off the brick. If the stains are
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