Step 3 prime the block wall.
Painting concrete block walls exterior.
Wait at least eight hours but no more than 30 days to paint.
Step number two is pressure washing.
Paint the entire wall with a thin coat of a concrete sealer or concrete primer.
Select paint appropriate for your outdoor project.
Pressure washing a block wall.
For exterior foundations and walls use exterior grade block filler such as behr s concrete and masonry bonding primer which also is good for interior concrete 17 98 per gallon.
Like the first coat you ll want this to be as even as possible.
Step 5 painting concrete.
For exterior projects use a power washer to rid the wall of all dirt and dust.
Exterior block surfaces can be either but interior block surfaces are always smooth.
Paint a concrete block wall in 5 steps.
Work slowly taking a little bit of paint on the roller at a time and applying in long smooth strokes.
Any gas pressure washer will work.
Preparing the concrete block for painting.
Choose paint for your project.
First step in preparing block wall for spray painting is to move any gravel away.
If you re thinking about painting a concrete block wall you should realize that moisture could be a problem and of course moisture will allow paint to separate eventually from whatever you have.
Step 4 caulk and seal.
Allow it to dry for four hours or for the time indicated on the sealer.
Clean the concrete wall.
Primer dries in two hours.
Step 1 clean the wall.
Step 2 repair the mortar.
For hard to reach or tight places you can use a brush but your brush strokes may be visible on smooth cinder blocks.
Repair any cracks or blemishes in your wall with concrete patch.
Step by step process of spray painting a concrete block wall.
You will need a paint that is.
Painting concrete block walls always starts with the removal of dust and dirt efflorescence and all loose or peeling paint.
Apply an even coat with a wide paintbrush.
Moving gravel away from the wall.