Mapei Primer G 5kg is a multi-purpose synthetic resin primer. This resin primer can be used to treat gypsum surfaces prior to fixing ceramic tiles or as a fixative for wallpaper adhesives, as an anchoring coat for gypsum-based sprayable plasters, for improving adhesion for smoothing compounds on cementitious or anhydrite and gypsum-based surfaces, as well as providing uniform absorption in cementitious or gypsum surfaces. Mapei Primer G dries in as little as two hours.