Quick-drying Vallejo Acrylic Fluid Medium dries flexible and waterproof. It comes in plastic bottles. The Gloss formula reduces the consistency of acrylic paint and increases gloss, flow, and transparency. The Matte formula decreases gloss and augments flow and transparency. The Satin formula reduces consistency and increases flow and transparency. Note — Freezing temperatures may damage this product. Please keep this in mind when ordering in cold climates and during winter months.