Technical > Problem Solving > Bubbles

Bubbles, Pinholes

Bubbles, Pinholes



Appearance

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