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What sheen do I need?
8 Oz. Sample
1 Gallon
1 Quart
5 Gallon
The following product(s) is required to properly prep and pre-treat wood prior to any stain project.
Required product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
$0.00
The following product(s) is required to properly prep and pre-treat wood prior to any stain project. Only available in store at Home Depot.
Required 3rd party product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
The 9 in. x 1/4 in. Polyester Adhesive Roller Cover has a hard texture, making it ideal for applying all types of adhesives to smooth surfaces. It can be used for stippling and applying sand paints.
The following product(s) is recommended when stripping is needed.
$0.00
The Home Depot logoSold Exclusively at The Home Depot
Image demonstrating mildew removal from exterior siding.

How to Remove Exterior Mildew Stains

Image demonstrating mildew removal from exterior siding.

Make sure to remove any mildew stains before you paint your home's exterior.

For Best Results:

Make sure to dampen the areas to be cleaned prior to applying the cleaning solution

Allow sufficient time for the cleaning solution to work (10 - 15 minutes).

  1. Wet area with water.

    Step 1
    Using a garden hose or a pressure washer, wet the mildewed area with water.

  2. Behr Premium All in One Wood Cleaner

    Step 2

    Using a pump sprayer, apply BEHR PREMIUM® All-In-One Wood Cleaner to the mildewed area.

  3. Apply cleaner.

    Step 3

    Reapply the cleaner as needed to keep the surface wet. Allow the solution to remain on the surface for 10-15 minutes. Scrubbing may be required on severely stained surfaces.

  4. Rinse clean.

    Step 4

    Thoroughly rinse the surface with water. Allow it to dry.

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Suggested Tools & Supplies
  • Bucket
  • Hose
  • Ladder
  • Pressure Washer
  • Protective Apparel
  • Pump Sprayer
  • Rags
  • Scrub Brush
More How-tos
Additional Resources
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