Paint Quality Institute

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Prep, Prime and Paint
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Hardboard

Not Painted Before and not Primed/To Be Painted

  1. Surface Preparation:
    • carefully clean off any dirt with water and a soft bristle brush
  1. Priming:
    • priming is necessary
    • use a quality latex exterior primer that is recommended for hardboard siding
    • prime immediately after installation; or pre-prime before installation
    • prime all edges, including where possible those cut as part of installation
    • priming will maximize resistance to wax bleed and swelling; and minimize mildew growth
    • do not leave a primer unpainted
  1. Painting:
    • use top-of-the-line exterior 100% acrylic latex house paint in flat, satin, semigloss finish, depending on appearance desired
    • satin paints are less vulnerable to wax bleed through than are flat paints (particularly "economy" flat products)

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