Solvent Popping

Solvent Popping: Small bubbles form in the paint layer, which may burst. This often occurs on humid or hot days when moisture gets into the paint.

Description:

Solvent popping is primarily caused by moisture entering the paint surface or improper cleaning of the substrate.

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Cause:

  1. Improper cleaning or preparation of the substrate. For example, if gasoline is used for sanding filler, it may leave water-soluble impurities behind.
  2. Insufficient evaporation time before the next paint layer or an excessively thick filler layer, preventing complete solvent evaporation.
  3. Too fast-evaporating thinner or high-viscosity paints.
  4. Poor-quality thinner that prevents proper drying of the filler. When the topcoat is applied and heated, the solvent evaporates and creates bubbles.
  5. Insufficient drying, sudden heating, or overly rapid external drying.
  6. Excessively high drying temperature.
  7. Excessively high spray pressure or incorrect method for applying filler.


Repair:

  1. Sand the surface again to remove the bubbles and repaint the surface.

Recommended products to prevent and fix potential issues:

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