Foam Panel Category — 18-Pack Square Self-Adhesive Soundproofing Wall Panels — 12×12×0.4 inches each, High-Density Foam, White, Suitable for Home Offices, Recording Studios, and Ceilings

This 18-piece foam panel set features the standard square dimensions of 12×12×0.4 inches per piece. Made from high-density (23 kg/m³) polyurethane foam, the panels come in a clean white finish with a smooth, flat surface (or a very fine texture—the original text was ambiguous, so it can be described as a “matte flat finish”). While a flat design may not absorb sound as efficiently as pyramid or wedge-shaped profiles, its primary advantage lies in its minimalist aesthetic, allowing it to blend seamlessly into Nordic-style or modern minimalist interior designs. Each pack contains 18 panels, providing a total coverage area of ​​18 square feet—sufficient to treat the ceiling or a primary wall in a small home office. The 0.4-inch thickness is ideal for ceiling applications, as it does not visually reduce the perceived ceiling height. The panels feature a self-adhesive backing for easy installation. In practical use, these flat foam panels still effectively absorb a certain range of high-frequency reflections, making them particularly effective at reducing vocal echoes. You can also easily cut them into custom shapes to fit around electrical outlets or light switches. The white surface can be lightly colored using water-based paints (compatibility testing recommended). An alignment template sheet is included to assist you in accurately cutting holes in the panels where needed.