Matisse Acrylic Medium MM4 Gel Medium (Gloss Finish)Dries clear or mixes with Matisse colours to give a 3D high gloss glaze. (Size: 10L, 250ml, 1L, 4L) It acts as the main intermixing medium in acrylic painting when its rich buttery consistency is required for impasto work, 3 dimensional extrapolations, multi layer work and heavy, smooth or textural glazes. It is well known that acrylic paints ""surface"" dry very rapidly but heavily imposed brushstrokes of paint take much longer to dry than thinly