Water-soluble, acrylic primer for plastics and acrylic paints, with strong adhesion and resistance to alkaline surfaces. It stabilizes new surfaces for painting and reduces their absorbency, thus increasing the efficiency of the colors and doubling their lifespan. The primed surface ensures uniformity of the final paint. It is odorless, dries quickly, and penetrates deeply. It has high performance and is suitable for both indoor and outdoor use.