Sunboard or Foam board is a versatile, lightweight, and durable sheet material commonly used for various applications. It features a core of polystyrene foam sandwiched between two layers of white clay-coated paper. This material is ideal for mounting vinyl prints, framing backs, and painting. Beyond printing, Sunboard is frequently employed for prototyping, creating architectural models, and making casting patterns. Hobbyists use it for scale model displays, dioramas, and computer game backgrounds. It also serves as a reflector in photography studios and is used in the design industry for product presentations. In the aerospace modeling community, it’s used to build small radio-controlled aircraft.

In recent years, Sunboard has gained popularity for large-format printing and store branding. Photos or designs are printed on self-adhesive vinyl and then mounted onto Sunboard, which can be affixed to walls, pillars, or other flat surfaces using double-sided adhesive tape or nails. Alternatively, Sunboard can be directly printed using a UV flatbed printer, providing longer-lasting prints that resist peeling.