Bubbles and Pinholes Causes and Solutions - Whitford Worldwide <
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Bubbles, Pinholes

Bubbles, Pinholes


Many small pock-marks or tiny holes in the coating.




Many small pock-marks or tiny holes in the coating.


Probable Causes


  1. Excessive agitation, causing coating to foam, trapping gas or air bubbles.
  2. Excessive pumping or a leaking pump.
  3. Rapid evaporation of solvent.


Suggested Solutions


  1. Reduce agitation in tank and check pumping process
  2. Add small amount of slow-evaporating solvent.
  3. Warm parts more gradually, flash briefly before curing.
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