It is used for priming the substrate before applying thin-layer acrylic (for plasters in colors that match the color of the substrate) and mineral plastering, and before painting with water-based (emulsion) paints based on acrylic and polyvinyl acetate. BOLIX O is especially recommended for priming the substrate under the BOLIX TM mosaic acrylic plaster. It is used for priming the reinforced layer in insulation systems and absorbent mineral substrates (such as concrete surfaces, brick and aerated concrete walls, cement, cement-lime and gypsum plasters as well as gypsum boards). The preparation reduces and unifies the absorbency of the substrate and reduces its dustiness. It aligns the course of binding and drying of applied plaster. It improves the adhesion of mortar and plastering mass to the substrate and facilitates work during plastering. It prevents the transfer of impurities from the primer layers to the plaster and eliminates the possibility of stains. Increases the adhesion of paint coatings to the substrate. It protects the primed surface against the harmful effects of moisture and Prevents the transfer of impurities from the primer layers to the plaster and eliminates the possibility of stains.