SAGGING

Downward “drooping” movement of the paint film immediately after application, resulting in an uneven coating.

POSSIBLE CAUSE:

• Application of a heavy coat of paint.
• Application in excessively humid and/or cool conditions.
• Application of overthinned paint.
• Airless spraying with the gun too close to the substrate being painted.

SOLUTION:

• If the paint is still wet, immediately brush out or re-roll to redistribute the excess evenly.
• If the paint has dried, sand, and reapply a new coat of top quality paint.
• Correct any unfavorable conditions: Do not thin the paint; avoid cool or humid conditions; sand glossy surfaces.
• Paint should be applied at its recommended spread rate; avoid “heaping on” the paint.
• Two coats of paint at the recommended spread rate are better than one heavy coat, which can also lead to sagging.
• Consider removing doors to paint them supported horizontally.

Note: Images & information provided by The Rohm & Hass Paint Quality Institute.