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Surface Preparation

Caulking: The Unsung Hero of a Polished Finish

February 19, 2024 · John Patten Painting

Five-year-old unpainted caulking that has discoloured and collected dust
Five-year-old caulking that was left unpainted has discoloured and collected dust.

Expertly applied caulk can elevate a room, particularly in light-coloured spaces. It bridges gaps between trim and walls and creates crisp lines. In inexperienced hands, though, it becomes an eyesore.

The caulk conundrum

Caulk never fully hardens, so it can move without cracking. That same flexibility means exposed caulk attracts dust and grime, which embeds in its surface and turns clean lines into permanent smudges, especially on horizontal edges.

Timing is everything

Ideally caulking is done before the final coats of wall and trim paint. Painting over it gives:

  • Protection: paint seals the caulk against dirt.
  • Cleanability: a smooth surface that wipes clean.
  • Longevity: a bright, finished look that lasts.

Skilled execution

  • Preparation: clean gaps of the right depth.
  • Material: the right paintable, flexible caulk for the surface.
  • Technique: a consistent, smooth bead.
  • Timing: proper curing before paint goes on.

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