Blocking is the undesirable sticking together of two painted surfaces when pressed together (e.g. a door sticking to the jamb).

blocking

Possible cause

Blocking happens when a sufficient drying time has not been allowed before closing doors or windows and is more common when using low-quality semi-gloss or gloss paints.

 

Solution

Use a premium semi-gloss or gloss acrylic enamel paint like Dulux Aquanamel®. Low quality semi gloss and gloss water-based paints can have poor block resistance, especially in warm, damp conditions. Always follow paint label instructions and dry times. Acrylic enamel paints have a better early block resistance than vinyl latex paints.


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