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See all Exterior paint how-to »

How to Remove Efflorescence

Skill:  Novice DIY'er

Efflorescence is a white "salt-like" build-up caused when moisture moves through stucco or masonry surfaces.

For Best Results:

Remove efflorescence before recoating a surface.


Suggested Supplies

  • Hose
  • Vinyl Gloves
  • Protective Apparel
  • Pump Sprayer
  • Rags
  • Scraper
  • Scrub Brush
  • Sponge
  • Vinegar
  • Wire Brush
Step 1

Using a wire brush or scraper, remove any loose or peeling paint from the damaged area.

Step 2

Mix 1 part BEHR PREMIUM® Concrete & Masonry Cleaner & Etcher with 1 part water in a 5-gallon bucket or pump sprayer.

Step 3

Using a water-dampened sponge or garden hose, wet the area to be cleaned.

Step 4

Apply the cleaner and etcher solution to the area with a sponge or pump sprayer. Using a scrub brush, lightly scrub the area to remove the white powdery residue from the surface.

Allow the cleaner and etcher solution to set for 5-10 minutes. Make sure the product remains wet.
Step 5

Using a water-dampened sponge or a garden hose, thoroughly rinse the surface.

Step 6

Allow the area to dry.