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