Mapei Primer S/N is a high-performance, two-component epoxy primer (Part A & B) designed for superior adhesion and surface preparation. Ideal for cementitious substrates, it enhances bonding of self-leveling compounds, mortars, and coatings. Fast-curing and low in VOCs, it provides excellent penetration, sealing, and a uniform surface for subsequent applications, ensuring long-lasting, durable results.