Masterson - Artist Palette Seal 16x12 - 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 days or wekks to come when they're sealed in the airtight Masterson Palette Seal. For acrylics and other water-soluble paints, use Mastersons patented Sta-Wet Premier Acrylic Paper and Sponge. (Sold separately) The sponge, when moistened and combined with Mastersons Acrylic Palette Paper, maintains a moist enviroment inside the Artist Palette Seal. You will be ready to continue painting up to weeks later when you store your paints in a genuine Masterson storage container!