
Cracking/Peeling
When the paint lifts from the underlying surface in the form of flakes, it is generally preceded by Cracking and this occurs on different surfaces.
Possible Causes |
Solutions |
Excessive Dry Film Thickness. This thickness is prominent with acid catalyzed materials |
• Use wet film gauge during application. • Ensure not to have a dry film thickness of more than 4-5 mils with acid catalyzed materials or pre-catalyzed lacquers. |
Cracking by Occurrence of Repeated cycles of Freezing and Return to Room temperature. |
• Put a small piece of painted wood in a freezer for an hour and then, keep it in the room temperature. • Repeat the process for 10 times and check whether the paint cracks. • Paints are formulated mostly to resist upto 10 cycles. |
Cracking of Grain or Veneer | Cracks following the wood grain show that the wood is actually cracking and not the paint. |
Cracking of Exterior wood and plywood as it Expands and Contracts depending on the Humidity and Temperature. The change is transmitted along the coating also. | Scrape, sand or scrub with a wire brush to remove loose and peeling paint. |
Poor Paint Penetration on wood with excessive amount of ‘flat’ hard grain pattern that is smooth, hard and non-porous. | If needed, sand wood to a fresh surface. |
Poor Surface Preparation / Applying thin coat of paint |
• Do not allow the wood to weather prior to coating. • Follow label and data page directions on how to prepare surface, before coating. |