Brustro Impasto gel Medium ( Gloss finish ) Water-based medium for creating textures, knife, and brush marks. Adds volume to paints and dries translucent. Brustro Impasto Medium can be applied by brush, palette knives, or sponge to get different textures and 3D surfaces. Ideal for oil paints and heavy body paints. It extends the paint without altering the consistency. It dries translucent and can be painted upon. Can be added in the ratio 3:7 to paints without any colour shift. On drying, there may be a little loss in volume as this medium is water-based.