Use this water-based paint marker on almost any surface material and use. POSCA Paint Marker delivers rich-pigmented nontoxic paint that can be used on almost any surface. Unique water-based formulation delivers bright matte opaque color that withstands the passage of time. It is weather-resistant and odorless. Quick-drying color can be layered and mixed with other colors to enhance your creations. To ensure a consistent texture from beginning to end a little ball is placed inside the marker to mix the ingredients of the POSCA paint. Valve mechanism guarantees a perfect seal for the market and conserves paint over time. This mechanism is used to prime the POSCA for use and resaturate the tip as often as necessary. Barrel shape allows a comfortable grip. Sealed cap ensures a long life for the marker.