blistering

In painting, "blistering" refers to the formation of bubbles or blisters on the painted surface. These blisters are caused when the paint film loses adhesion and lifts away from the underlying surface, creating raised areas that resemble bubbles.

Common Causes of Blistering:

• Moisture: Trapped moisture beneath the paint film, often due to painting on a damp surface or moisture penetrating from behind (e.g., through walls).
• Heat: Painting in direct sunlight or on a hot surface can cause the top layer of paint to dry too quickly, trapping solvents or moisture underneath.
• Poor Surface Preparation: Painting over dirty, oily, or glossy surfaces without proper cleaning or sanding can prevent proper adhesion.
• Incompatible Paint Layers: Applying a solvent-based paint over a water-based paint (or vice versa) without proper preparation can lead to blistering.

Prevention Tips:

• Ensure surfaces are clean, dry, and properly prepared before painting.
• Avoid painting in extreme heat or direct sunlight.
• Use compatible paint systems and follow manufacturer recommendations.
• Allow adequate drying time between coats.

Blistering not only affects the appearance of the paint job but can also lead to premature paint failure if not addressed properly.