Tips & Techniques


Blocking

May 08, 2017
Do you have a door or window that is stuck or two painted surfaces catch when pressed together?  Too many paint layers, and you are not trying to achieve a vintage look?

This is called blocking.

POSSIBLE CAUSES

  • Not allowing sufficient time for the coating to dry on doors or windows before attempting to close them.
  • Using low-quality satin or gloss paints. These generally have poor block-resistance, particularly in warm, damp conditions.

SOLUTION

Always use top-quality satin or gloss acrylic water-based paint, and follow the drying times recommended on the paint label. 

Acrylic water-based paints generally have better early block-resistance than vinyl acetate co-polymer-based paints or solvent-based paints; however, solvent-based paints develop superior block-resistance over time. 

A sprinkling of talcum powder in the affected areas may help to relieve persistent blocking.

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