A primer or undercoat is a preparatory coating to be applied on surfaces before painting.
Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.
Finishes are formulated to give a specific function to the final surface: cosmetic properties, mechanical resistance, chemical resistance, UV protection, etc.
Finishes could contain functionalizing additives ( glass powders, metal flakes, nano-intermediates) to support the required function.
Anti-fouling paint, or bottom paint, prevents barnacles and other marine organisms from adhering to the hulls of ships.
Can contain specific metals or metal compounds to help preventing growth of organisms.
A filler is a product that is used to achieve a smooth-textured finish by filling pores, defects or imperfections on surfaces.
Specialized fillers can also be used to repair underwater damages, improving structural integrity and preventing water spillage.
Coatings are liquid, liquefiable, or mastic compositions that, after application to a substrate in a thin layer, converts to a solid film. They are most commonly used to protect, color, or provide functionalities to surfaces. Coatings are divided into groups depending on their properties and use: