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Differences in Exterior & Interior Paint


    • The chemicals in an exterior paint make it unsuitable for inside use. Exterior paint contains fungicides that may stink when the humidity is high and could cause a health-risk. Exterior paint may also contain UV protective additives which are not for use on the inside. Exterior paint used in the interior can make your allergies worse. Additives called mildewcides are contained in exterior paints. Some interior paints contain this addictive as well. This additive helps resist the growth of mildew. The levels of this additive in exterior paint are higher and should not be used in interiors.

    Facts About Exterior Paint

    • Exterior paint dries fast and is resistant to the environment; however, it is harder to apply than interior paint. It doesn't spread as smoothly. Exterior paint is flexible so that it can tolerate contraction and expansion, which are caused by the weather. Exterior paint boasts color retention qualities that aren't necessarily found in interior paints.

    Characteristics of Interior Paint

    • Paint that is intended for indoors is made so that it is stain resistant as well as capable of being scrubbed. Interior paint is splatter resistant. There are interior paints that are mildew resistant and durable that can be used in kitchens and bathrooms.

    Stink Factor

    • Most exterior paint is acrylic with an oil based primer used underneath. Acrylic and water based paints can stink although new paints on the market have low VOC levels (volatile organic compound) and sometimes zero VOC, which means that they don't contain harmful ingredients that can cause the bad odors. When using oil-based paint indoors, you'll need proper ventilation and a protective mask because the fumes are very strong.

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