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Frosting

  • Manifestations
    • It is a white substance that looks like salt and appears on a painted surface.
    • Any color of paint is susceptible. It is, however, not as apparent on white paint or the lightest tinted colors.
    • When it appears on masonry, it is often perceived as efflorescence.
  • Causes
    • Raindrops, dew or other moisture, which impacts the painted surface.
    • Using paints of a dark color and formulated with a calcium carbonate extender.
    • Applying paint that is a dark color over a coat of primer or paint containing calcium carbonate.
  • Solutions
    • This stubborn problem is not easy to wash off. Even after being successfully removed, it can become a recurrent condition.
    • It may bleed through any additional layer of paint. Sometimes it can even interfere with adhesion.
    • The optimal way to remove frosting is by using a wire brush on masonry or sandpaper on wooden surfaces.
    • Rinse thoroughly.
    • Coat with an alkyd-based primer.
    • Allow to dry for recommended length of time.
    • Apply premium quality exterior paint.