The Waterborne polymer primer is available in a dark brown color; ideal as a base for tracks. Its superb adhesion qualities combined with a matt-satin finish make this primer the perfect choice for preparing models for painting. Only a light layer of primer is required for full, effective coverage. Water soluble, odorless and non-toxic. We recommend AK-712 Acrylic Thinner for a correct thinning. Dries completely in 24 hours.