Wait at least eight hours but no more than 30 days to paint.
Seal and paint concrete block wall.
Make sure to apply 2 coats to achieve the highest durability.
How to seal cinder blocks walls.
Designed to form an impermeable barrier to water on interior and exterior vertical or horizontal concrete block and cast in place concrete.
Primer dries in two hours.
Standard concrete block is semi permeable 5 perms.
Then scrub the area with a wire brush.
Drylok extreme latex base masonry waterproof coating is drylok extreme latex base masonry waterproof coating is ideal for interior exterior above or below grade masonry walls basement walls foundations landscape walls cinder blocks concrete blocks bare concrete swimming pools stucco and brick.
Painted walls will need all loose and peeling paint removed.
Step 5 painting concrete block.
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.
New unpainted concrete block walls need to have all dirt and loose mortar removed prior to priming.
The best type of concrete paint for exterior walls is also elastomeric while 100 percent acrylic paint is a second best option.
The best and easiest way to make sure your cinder blocks will not leak is to take preventive actions before you need it.
Lift off the peeling paint with a stiff putty knife or paint scraper.
Low voc mold and mildew proof white water based waterproofing paint is a modified acrylic co polymer concrete and masonry waterproofing paint and finish.
A great newly concrete poured wall with 8 10 inches thick is considered impermeable.