Stencils, Texture, Mixed Media, Canvas Art Pentart thick water based gels can be used to create various textures with stencils and can be used as a glue and as a base medium. The heavy body gel matte sticks to any surface easily & can be coloured, Mix with Pigment Powders or Mineral Powders for a special effect and they dry flexible. They are excellent for mixed media projects and art journaling. The matte dries with an opal finish