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 and windows.
  • Use of low quality semi-gloss or gloss paints.

Solution

Use a premium semi-gloss or gloss acrylic enamel paint. Low quality semi-gloss and gloss water-based paints can have poor block resistance, especially in warm, damp conditions. Follow paint label instructions regarding dry times. Acrylic enamel paints have better early persistent blocking.

Images courtesy of the Paint Quality Institute from Dow Coating Materials

Colourplus recommends Colourplus Ultra Premium Ultracare Gloss and Ultracare Semi Gloss.

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