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Close up image of a surface that has lost its color and looks like the paint film has deteriorated.

Causes

  • Applying oil-based or vinyl acrylic water-based paints to new masonry that has not fully cured (high pH level).

Solutions

  • Allow fresh masonry surfaces to cure for at least 30 days before painting. If this is not possible, use a high-quality, alkali-resistant primer.
  • Test alkalinity of the surface with a pH pencil.
  • Paint with a high-quality exterior paint and avoid colors that are alkali-sensitive.

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What Product Do I Need?
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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 uncoated and previously coated concrete surfaces.
Required product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
$0.00
The following product(s) is required to properly prep uncoated and previously coated concrete surfaces. 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 a topcoat clear finish is desired.
$0.00
The Home Depot logoSold Exclusively at The Home Depot