Frosting
 

Description:
A white, salt-like substance on the paint surface. Frosting can occur on any paint color, but it is less noticeable on white paint or light tints. On masonry, it can be mistaken for efflorescence.

Possible Cause:
Frosting is most noticeable on dark colors and forms in areas that are protected from the cleansing action of rainfall. The crystals form when the paint is exposed to excessive moisture (dew, condensation, rain, etc.) or cool temperatures during the application and drying process. Frosting can occur on virtually any surface or substrate.

Solution:
If frosting occurs, use a garden hose to flush crystal formations with warm tap water. Water-soluble crystals will disappear. Follow-up water flushing may be required at later dates and eventually crystal formation will cease. If crystals are not water-soluble, then other actions are required. Allow surface to dry thoroughly. Using medium grit sanding paper, lightly sand crystals away until original color of paint film reappears. Remove all loose dust and apply a uniform coat of Oil Wood Primer. This oil undercoater will act as a barrier coat pre venting the formation of future frosting. Apply paint to all surfaces during weather conditions that allow proper curing of the paint film.

Caution: Wear a face mask to avoid inhalation of dust particles during the sanding procedure.

Note: Frosting may dissipate over time (several weeks or months).

Recommended System:
Primer - Wood
1 Coat of FLEX BON #169 Series Exterior Alkyd Primer
Topcoat - Wood
2 Coats of Top Quality FLEX BON Exterior Latex Paint
Primer - Masonry
1 Coat of FLEX BON #194 Series Exterior 100% Acrylic Latex Primer
Topcoat - Masonry
2 Coats of Top Quality FLEX BON Exterior Latex Paint