This slow-drying thinner is specially formulated to mix with the Bob Ross Soft Oil Paints so that colors will blend beautifully right on the canvas. Get soft delicate coverage with just a touch on the brush; a remarkable potion that glides color onto the canvas. This package contains 3.38oz of oil paint medium. WARNING: Extremely flammable. Keep away from children. Conforms to ASTM D 4236. Imported.