Save paint, time and money using the Masterson Palette Seal. This airtight container safely holds any type of paint palette between sessions. For oils, place your favorite type of palette - wood, glass, plastic or paper - into the Palette Seal tray and snap on the lid. Your paints will stay fresh for many days-even weeks when they're sealed! For acrylics and other water-miscible paints, use Masterson's patented Sta-Wet Premier Acrylic Paper and Sponge, sold separately.