Uneven Loss Of Gloss

Last updated: May 18, 2020

What Does Uneven Loss Of Gloss Mean?

Uneven loss of gloss is a coating defect characterized by the irregular reduction in sheen or luster across a material’s surface. In other words, some areas of the surface may appear to lose its gloss faster than other areas, resulting in an uneven finish. While unsightly, this defect is classified as cosmetic, i.e., it does not affect the overall integrity of the applied coating.


Corrosionpedia Explains Uneven Loss Of Gloss

Uneven loss of gloss may have several possible causes, including:

  • Heavy dew, moisture or condensation intrusion during paint drying
  • Applying the coating over a porous surface
  • Using interior paints on outdoor surfaces
  • Changes in temperature during drying
  • Applying the paint or coating in uneven layer thicknesses
  • Insufficient coating thickness

This phenomenon can be prevented by avoiding the above conditions. Applying a primer or sealer to the substrate ensures that the topcoat is applied to a uniform surface. Another effective method for avoiding uneven loss of gloss is using best coating practices to prevent irregular or insufficient application thickness.


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