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Interior Paint Problem Solver
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Blocking
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Undesirable sticking together of two painted surfaces when pressed together (a door sticking to a jamb, for example).
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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