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Close up image of a surface that has tan or brownish streaks or spots.

Causes

  • All latex paint formulas will exhibit this tendency to some extent if applied in areas that repeatedly become humid (bathrooms, for example), especially in ceiling areas.
  • Painting in cool, humid conditions, or just before or after rain. The longer drying time caused by these conditions allows the paint’s water-soluble ingredients to rise to the surface before the paint thoroughly dries.

Solutions

  • Avoid painting when temperatures are below 50º F in the late afternoon and if cool, damp conditions are expected in the evening or overnight.
  • If the surfactant leaching occurs in the first few days after the paint is applied, the blotches or stains can usually be rinsed off with a strong stream of water from a garden hose. A month of normal weathering will remove even stubborn cases of leaching. Surfactant leaching does not affect the ultimate durability of the coating.
  • Never apply another coat of paint on any painted surface that exhibits surfactant leaching.
Close up image of a surface that has tan or brownish streaks or spots.

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The following product(s) is required to properly prep uncoated and previously coated concrete surfaces.
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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.
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