Prime absorbent (stable) substrate using MFA Classic concentrate diluted 1:3 with water. Apply primer with a wide brush, working it well into the substrate. Priming strengthens the substrate and improves adhesiveness and coverage of further coats.
Prime absorbent (weak) substrates and surfaces of old walls with MFA PLUS diluted max. 1:3 with water. Apply primer with a wide brush, working it well into the substrate. Deeply penetrating and binding the substrate, priming strengthens it, reduces excessive absorbency, and improves the coverage of further coats.