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