The paint departments of home improvement stores offer a selection of interior and exterior paints. But most people do not know why there is a distinction.
There are several differences between interior and exterior paint. Both types contain the same basic elements. However, interior and exterior paints do not contain the same binding resins. Exterior paints are made to acclimate to variations in temperature and moisture. The binding resins of exterior paint are firm, making the paint less susceptible to chipping and easier to wash.
Interior paints contain additives that make them easily cleaned. Interior paints are also made to resist scuffs, fading and mildew. Interior paints are not used outdoors because they cannot handle differences in temperature. While interior paints can withstand mold; exposure to large amounts of moisture will result in a mold problem.
The differences between interior and exterior paint are important. People engaging on their next paint project should make sure to purchase the right type.