Wall coatings are decorative or protective layers that are applied to a building’s interior or exterior walls. They are viscous enough to avoid running and provide abrasion and environmental resistance. Some wall coatings are characterized by excellent adhesion. Typically, wall coatings are used in warehouses, chemical plants, offices, manufacturing facilities, and commercial buildings. The walls that are coated can be below-grade or above-grade. Wall coatings for below-grade surfaces, bathroom walls, kitchen walls, and some exterior walls should provide moisture and/or water resistance. For most exterior walls, however, waterproof wall coatings are required. Products with coarser particles are designed to provide a popcorn coating or textured, anti-slip surface.
Wall coatings include wall paints, wall sealers, and wall primers; wall paint adhesion promoters; concrete wall coatings, building wall coatings; and construction wall coatings; and both wood wall paint and wood wall coating. There are two basic types of wall paint: water-based (latex) and acrylic-based (oil). Waterproof wall paints are wall sealers that form a vapor barrier on interior walls, preventing the ingress of moisture that can damage insulation and fixtures. Wall primers are vapor barrier primers and other products that are designed to prepare a surface for painting. Typically, wall paint adhesion promoters are applied before wall paints and primers. These wall coatings are designed achieve a specific thickness. Concrete wall coatings, building wall coatings, and other construction wall coatings may be designed for either interior or exterior applications. Some wood wall paint and wood wall coatings (such as primer) may be applied over paneling.
Types of wall coatings include wallboard sealers and wallboard paints; plasterboard sealers, plasterboard paints, and other types of plasterboard coatings; and metal wall coatings, steel wall coatings, and aluminum wall coatings. Wallboard or dry wall is a wide, flat board or panel made from plaster or wood pulp, or from materials such as vinyl or gypsum. Wallboard sealers are designed to provide an undercoat for wallboard paints. Plasterboard is a type of wallboard with a gypsum core bonded to layers of paper or fiberboard. Plasterboard sealers are applied with rollers and used to minimize differences in surface texture and porosity. By preventing chemicals from affecting the paint surface, these wall coatings also prevent sheen staining while concealing joints. Most plasterboard paints involve a three-part paint system one coat of sealer and two top coats. Wall coating for metal surfaces are also commonly available.