What should be used before applying latex paint to new drywall?

Before applying latex paint to new drywall, it is essential to use a water-based primer sealer. This type of primer serves several critical functions that prepare the surface for painting.

New drywall tends to be porous and can absorb paint unevenly, leading to an inconsistent finish. A water-based primer sealer helps to create a uniform surface by sealing the drywall and ensuring that the latex paint adheres properly. Additionally, it prevents the paint from soaking into the drywall, which can result in increased paint consumption and an uneven appearance.

Using a water-based primer also facilitates better color retention and improves the overall durability of the paint job. This is especially important in areas where the wall may be exposed to moisture or other environmental factors that could affect the longevity of the paint.

In contrast, while oil-based primers can be used in specific situations, they are generally not necessary for new drywall intended to be finished with latex paint. Furthermore, epoxy primers are designed for more specialized applications, typically on materials that require strong adhesion or where chemical resistance is critical, rather than on drywall surfaces. The idea that no primer is needed overlooks the importance of preparing the substrate for optimal painting results.