The surface to be painted should be dry and free from dirt, grease, oil and loose matter. The primer should be stirred well before use. Generally 500 - 750 ml of water is required for 1 litre of Agsar Exterior WallPrimer (E.W.P). Protect the newly brushed surface from dust before drying. The primed surface should be allowed to dry hard and rubbed with emery before finish coats are applied.