Primers & GessoHobbycaft offers Primers & Gesso of these brands Sakura, Royal Talens, Folkart and Angelus. These Primers and Gesso are very popular among artists. Primers and gesso are foundational materials used in painting to prepare surfaces before applying paint. They provide a suitable surface for paint adhesion, prevent paint from soaking into the substrate, and ensure the longevity of the artwork. Gesso is a white, chalky substance that is used to prime surfaces before painting. It creates a uniform, slightly textured surface that promotes paint adhesion and prevents paint from soaking into the support.