Selling Acrylicos Vallejo Gloss Medium 60 ml  for Acrylicos Vallejo Model Color and Model Air additive painting model kits with extends the colors, increases their fluidity and transparency, and softens the blending of brushstrokes. It heightens the flexibility of the color, and their adhesion to the surface. It does not yellow or change tonality of the color. It can also be used as a binder for drying pigment.