Ensure the surface is sound, clean, dry, and free from dust, oil, grease, laitance, loose particles, and curing compounds. Repair all cracks/voids and allow the surface to dry properly before priming. Stir/mix primer thoroughly before use (do not dilute unless specified). Apply 1st coat primer uniformly using roller/brush/airless spray. Maintain proper coverage and avoid ponding; ensure primer penetrates the substrate. Allow primer to dry tack-free before applying the next coat/topcoat system.