Blister Appearance Causes and Solutions - Whitford Worldwide
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Small, blister-like bumps on the coating surface.




Small, blister-like bumps on the coating surface.


Probable Causes


  1. Coating has been applied too thick.
  2. Rapid evaporation of solvents (using a solvent that is too volatile), or increasing part temperature too rapidly


Suggested Solutions


  1. Remove coating and reapply a thinner coat.
  2. Remove coating, preheat parts, then recoat and cure immediately.
  3. Add small amount of slow-evaporating solvent.
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