Thoroughly rinse the concrete surface with clean water using a hose with a high pressure nozzle or a pressure washer.
Prep concrete block wall for paint.
Choose paint for your project.
Apply paint with a sprayer roller or brush in even strokes.
Typically you can cover about 200 square feet per gallon of block fill primer on a smooth face and about half that amount on split face.
Paint should be about 1 8 inch thick to ensure waterproofing.
Use a commercial style pressure washer and at least 2500 psi.
The first step when preparing concrete block walls is pressure washing.
Examine the walls.
All it takes is time and some very careful preparation.
According to reliable builder masonry paint is specifically designed for good adhesion durability and breathability.
Nap roller and you can clean up with soap and water.
Excess residue may interfere with adhesion of the coating.
Waterproof doesn t mean this is a solution to serious water problems in your basement.
The surface is ready for priming when it feels like medium to light grit sandpaper and no residue or loose concrete remains.
Apply two healthy coats with a 1 2 in.
Make sure to prime all mortar as well.
For exterior projects use a power washer to rid the wall of all dirt and dust.
It s made to work on a range of masonry walls concrete block stucco or brick.
How to prep walls for drylok.
During the preparation pay attention to any loose mortar and large cracks.
Patch gouged or otherwise damaged areas with concrete filler.
The texture will determine the amount of primer and paint needed.
Smooth face concrete requires considerably less primer.
Any remaining loose paint will need to be removed manually.
You will need a paint that is.
Clean the concrete wall.
When you set out to paint concrete the process.
Select paint appropriate for your outdoor project.
Paint your concrete walls with masonry paint.
Clean the concrete surface with tsp.
Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush.
A suitable spray pattern is the 15 degree tip held 12 inches from the surface.