What is Formica most commonly used for?

Formica is most commonly used for surface finishes because it is a brand name that represents a type of laminate made primarily from paper and plastic resin. This material is highly valued for its durability, resistance to scratches and stains, and aesthetic appeal, making it ideal for countertops, tabletops, cabinetry, and other surfaces in both residential and commercial settings. The laminate can mimic the appearance of wood, stone, or solid colors, allowing for versatile design options while providing a protective surface that’s easy to clean and maintain. This extensive use in surface finishing aligns with the product's characteristics and the demands for durability and style in various applications.

The other choices suggest uses of materials that do not align with the primary purpose of Formica, as it serves specifically as a surface finish rather than structural materials, insulation, or packaging.