| Blocking: Undesirable sticking together of two
painted surfaces when pressed together (e.g., a door sticking to the jamb).
Possible Cause:
Not allowing sufficient dry time for the coating before
closing doors or windows.
Use of low quality semigloss or gloss paints.
Solution: Use top quality semigloss or gloss acrylic latex paint. Low
quality latex paints can have poor block resistance, especially in warm, damp
conditions. Follow paint label instructions regarding dry times. Acrylic latex
paints generally have better early block resistance than vinyl latex paints, or
alkyd or oil-based paints; however, alkyds develop superior block resistance
over time. Application of talcum powder can relieve persistent blocking.
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