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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 semi gloss or gloss paints.
Solution:
Use top quality semi gloss 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. |
