Interior Latex Primer - Sealer is specifically designed to equalize surface texture differences between sanded tape joints and new drywall, resulting in an extremely uniform finish coat appearance. Primer - Sealer is ideal for airless spray application. Use on wallboard and tape joints in new construction or remodeling projects. Provides an excellent base coat for latex or oil-base paints. Formulated for professional painter use in residential, commercial, institutional and industrial applications.