Water-based, acrylic adhesion primer, reinforced with fine grain of quartz sand. Enhances the adhesion of coatings on absorbent surfaces. It is used before the application ofacrylic – siloxane plasters or coatings such as Top Decor, Gesso, Graffiato, beforethe spatulaing of concrete and as a primer for external thermal insulation systems.It is also suitable for use on already painted surfaces when they are to be spatulated. It is characterized by very strong adhesion to varioussubstrates of moderate absorbency such as, exposed concrete, plasterboards, adhesivesthermoproscopic adhesives, already painted surfaces. It is suitable for indoor and outdooruse.