How to Fix Frosting Paint

Learn how to identify and repair frosting on paint with this helpful how-to guide.

DEFINITION

What Is Paint Frosting?

A white, salt-like crystal substance on an exterior painted surface. On masonry, frosting marks may be mistaken for efflorescence.
CAUSES

What Causes it?

Frosting issues can occur on virtually any surface and happen when:

  • An areas is protected from the cleansing action of rainfall.
  • Paint is exposed to excessive moisture (dew, condensation, rain, etc.) or cool temperatures during the application and drying process. 

How to Fix Paint Frosting

STEP 1

Clean

For water-soluble crystals
Water-soluble crystals will disappear after washing with warm water. Follow-up water flushing may be required at later dates, and eventually crystal formation will cease.

For not water-soluble crystals
Allow surface to dry thoroughly. Then use a soft-bristle scrub brush to carefully scrub crystals away until original color of paint film reappears. Depending on the severity, this may be sufficient to remedy the problem and you can skip steps two and three.

STEP 2

Prime

If frosting residue remains, apply a coat of primer to act as a barrier coat and prevent the frosting from bleeding through.

STEP 3

Repaint

Apply another coat of the original finish. Be sure to paint during weather conditions that allow paint film to cure properly.

Paint Products to Finish the Job

For stubborn frosting residue add a coat of Exterior Oil-Based Wood Primer before repainting.

Top Featured Products