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Exterior Paint Problem Solver
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Poor Gloss Retention
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Deterioration of the paint film resulting in excessive or rapid loss of luster of the top coat. Direct sunshine can degrade the binder and pigment of a paint, causing it to chalk and lose its gloss.
Possible Cause:
Use of an interior paint outdoors.
Use of a lower quality paint.
Use of a gloss alkyd or oil-based paint in areas of direct sunlight.
Solution:
Use a higher quality paint. The binder in top quality acrylic latex paint is especially resistant to UV radiation, while oil and alkyd binders actually absorb the radiation, causing the binders to break down.
Surface preparation for a coating showing poor gloss retention should be similar to that used in chalking surfaces (see chalking).
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