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Solving Foaming & Cratering Problems2018-12-20T11:58:06-05:00

SOLVING

FOAMING & CRATERING PROBLEMS

FOAMING & CRATERING

Formation of bubbles (foaming) and resulting small, round concave depressions (cratering) when bubbles break in a paint film, during paint application and drying.

POSSIBLE CAUSES:

  • Shaking a partially filled can of paint.
  • Use of low quality paint or very old latex paints.
  • Applying (especially rolling) paint too rapidly.
  • Use of a roller cover with wrong nap length.
  • Excessive rolling or brushing of the paint.
  • Applying a gloss or semigloss paint over a porous surface.

SOLUTION:

  • All paints will foam to some degree during application; however, higher quality paints are formulated so the bubbles break while the paint is still wet, allowing for good flow and appearance.
  • Avoid excessive rolling or brushing of the paint or using paint that is more than a year old.
  • Apply gloss and semigloss paints with a short nap roller, and apply an appropriate sealer or primer before using such paint over a porous surface.
  • Problem areas should be sanded before repainting.

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Note
: Images & information provided by The Rohm & Hass Paint Quality Institute.