How to remove white stains from brick

Written by jaimie zinski
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How to remove white stains from brick
Remove white stains from brick without costly professional assistance. (BRICK WALL image by brelsbil from

Brick is an attractive and durable option for protecting the exterior of a home. A common problem that many homeowners face is efflorescence, which is a white build-up that is caused when the mineral salts in the mortar are broken down by water. For the most part these stains will fade, but this process can take several years. Help Mother Nature along by speeding up the removal of efflorescence in a single afternoon.

Skill level:

Things you need

  • Plastic bucket
  • Water
  • Hard bristled scrub brush
  • Rubber gloves
  • Muriatic acid
  • Garden hose

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  1. 1

    Soak a hard bristled brush in a plastic bucket of water.

  2. 2

    Applying pressure, scrub the white stains with the brush. The brush may need to be soaked in the water several times if there is a large surface area that requires cleaning.

  3. 3

    Wait several days. If the water alone will not remove the stain, prepare a solution of one cup muriatic acid and fifteen cups of water in a plastic bucket. Pour the acid into the water, not the other way around.

  4. 4

    With gloved hands, soak a hard bristled brush in the muriatic solution. Scrub the affected area. The brush may need to be soaked several times if the surface area that requires cleaning is large.

  5. 5

    Rinse away the acid mixture with a garden hose.

Tips and warnings

  • Immediately clean any skin that is exposed to the muriatic acid with soap and water.
  • Muriatic acid can be purchased at many home improvement stores.

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