Definition of "alligatoring" by Brushworks Painting:Alligatoring is a term used in the painting and coatings industry to describe a specific type of paint failure that resembles the cracked and patterned skin of an alligator. It typically appears as a series of wide, irregular cracks in the surface of the paint film, often exposing the underlying layers.
Causes of Alligatoring:
- Incompatible Paint Layers: Applying a hard, rigid topcoat (like oil-based enamel) over a softer, more flexible undercoat (like latex) can cause the top layer to crack as it dries and ages.
- Aging and Natural Deterioration: Over time, older oil-based paints can lose elasticity, leading to cracking.
- Improper Surface Preparation: Painting over a dirty, glossy, or poorly prepared surface can prevent proper adhesion.
- Applying Paint Too Thickly: Heavy application can cause the surface to dry faster than the underlying layers, leading to tension and cracking.
- Temperature Extremes: Painting in very hot or cold conditions can affect drying and curing, contributing to alligatoring.
Solution:
To fix alligatoring, the affected area usually needs to be:
- Scraped and Sanded to remove all loose and cracked paint.
- Primed with a suitable primer.
- Repainted using compatible paint systems and proper application techniques.
Alligatoring is both a cosmetic and functional issue, as it can lead to further deterioration if not addressed.