Close up image of the result when two painted surfaces are pressed together, one of the surface looks like the paint is peeling.

Blocking - INTERIOR

Undesirable sticking together of two painted surfaces when pressed together (e.g., a door sticking to the jamb).

Causes

  • Not allowing sufficient dry time for the coating before closing doors or windows.
  • Use of low-quality semi-gloss or gloss paints.
  • Applying another coat of paint before the previous coat is completely dry. Applying excessive amounts of paint on a surface.

Solutions

  • Use top quality semi-gloss or gloss paint. Low-quality latex paints can have poor block resistance, especially in warm, damp conditions. Acrylic latex paints generally have better early block resistance than vinyl acrylic paints, or alkyd and oil-based paints. However, alkyd and oil-based paints can develop superior block resistance on further drying/curing.
  • Follow paint label instructions regarding dry times.

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