What is the primary purpose of primer-surfacer formulations?

The primary purpose of primer-surfacer formulations is to build the surface, hide minor imperfections, and provide a stable surface for sanding. Primer-surfacers serve as an essential layer that can fill in small scratches, dents, or inconsistencies in the substrate, ensuring a smoother final paint application. They promote adhesion between the substrate and the topcoat, which is crucial for achieving a durable finish. By using a primer-surfacer, painters can effectively prepare the surface, reduce the visibility of imperfections, and create an even foundation that enhances the overall appearance of the paint job. This preparation ultimately leads to better application of the topcoat, providing a professional and polished look.

The other options, while relating to surface treatment, do not accurately depict the main function of primer-surfacers. For example, providing color and shine or enhancing the drying time of the topcoat does not constitute the primary role of primer-surfacers, nor does creating a textured finish. Instead, these formulations focus on establishing an optimal surface for subsequent layers.