Primers and topcoats are the two basic types of wall coatings, which play different roles in the coating system, with different properties and uses. Here are the main differences between primer and topcoat in several ways:
Uses:
Primer: The primer mainly acts on the bottom layer of the wall, providing a solid construction foundation for the topcoat. It fills tiny holes in the wall, improves water absorption and flatness, and enhances the adhesion between the topcoat and the wall. The primer can also provide protection to the topcoat and extend the life of the topcoat.
Topcoat: Topcoat is the surface layer of the coating, which is directly exposed to the external environment, responsible for beautifying the wall, providing protective functions such as weather resistance, chemical resistance, and abrasion resistance. The quality of the topcoat directly determines the final appearance and performance of the coating.
Nature
Primer: Primer usually has good filling and adhesion, but it does not have the durability and decorative properties of topcoats. There are many types of primers, including epoxy primers, polyester primers, acrylic primers, and more, and the properties of each primer are optimized for different wall materials and topcoat types.
Topcoat: Topcoat focuses on durability, decoration and protection, it needs to have good leveling, fullness and color saturation. There are also many types of topcoats, such as latex paints, acrylic paints, polyurethane paints, etc., and different topcoats are suitable for different occasions and needs.
Primer: The primer is relatively low because it only needs to provide the basic function of the underlayer.
Topcoat: Topcoat is usually higher than primer because it needs to have better protection and decoration.
Construction requirements
Primer: When applying, the primer needs to be applied evenly to ensure that every nook and cranny of the wall is adequately covered. Once the primer has dried, the topcoat can be applied.
Topcoat: The application requirements for topcoat are more stringent, and it is necessary to ensure that the coating is uniform, free of bubbles, and free of brush marks. Topcoat application often requires more advanced skills and more delicate craftsmanship.
To sum up, when choosing a wall coating, consumers should choose the right primer and topcoat according to their needs, budget, and wall material.