Concentration of water-soluble ingredients on latex paint, creating a
blotchy, sometimes glossy appearance, often with a tan or brownish
cast. More likely with tinted paints than with white or factory-colored
Possible Causes Surfactant Leaching
Painting in cool, humid conditions or just before they occur. The longer
drying time allows the paint’s water-soluble ingredients – which would normally evaporate, or be leached out
by rain or dew – to rise to the surface before paint thoroughly dries.
Mist, dew or other moisture drying on the painted surface shortly after it has dried.
Solution Surfactant Leaching
Avoid painting in the late afternoon if cool, damp conditions are expected in the evening or overnight. If
the problem occurs in the first day or so after the paint is applied, the water-soluble material can
sometimes be rinsed off rather easily. Fortunately, even more stubborn cases will generally weather off in a
month or so. Sufactant leaching should not affect the ultimate