Ready-to-use deep-penetrating primer for exterior and interior work. To improve the water repellent properties and durability, as well as to level off the absorbing capacity of mineral substrates such as gypsum plaster, lightweight concrete, foam concrete, aerated concrete, brick, plasterboard, magnesite panels, as well as fiberboard, particle board and plywood. Reduces and levels off the water absorption of the substrate, strengthens it. Promotes the enhancement of adhesion of paintwork coatings, adhesives, putties and mortars.