Allow to dry for 24 hours.
How to paint concrete block wall.
The type of paint you select for interior concrete walls will depend upon the use of the room as well as its décor.
Make sure to apply 2 coats to achieve the highest durability.
Apply paint with a sprayer roller or brush in even strokes.
Paint your wall with concrete paint.
The first step when preparing concrete block walls is pressure washing.
Any remaining loose paint will need to be removed manually.
Use a commercial style pressure washer and at least 2500 psi.
The paint should not be streaky or show brush strokes.
Apply the paint to the concrete block with an airless sprayer and then immediately back roll it working in sections along the length of your wall.
According to reliable builder masonry paint is specifically designed for good adhesion durability and breathability.
During the preparation pay attention to any loose mortar and large cracks.
Paint with a sheen or gloss will be easier to maintain for example.
A suitable spray pattern is the 15 degree tip held 12 inches from the surface.
Paint should be about 1 8 inch thick to ensure waterproofing.