You will need a paint that is.
Outside concrete wall paint.
Kilz one part epoxy acrylic concrete paint best concrete paint for outdoors this is a heavy duty epoxy solution that utterly seals off your indoor and outdoor concrete surfaces from anything and everything that might stain or damage it.
It is uv and weather resistant and holds up against tire tracks and typical outdoor spills such as those that come with changing the oil on cars and chemical concoctions for the pool home or garden.
Furthermore painting concrete walls is a relatively simple process done in the same manner as painting interior walls.
To top it off in true epoxy fashion this paint will last years under the roughest conditions.
Expect 1 gallon of acrylic latex porch paint to cover up to 400 square feet.
For exterior projects use a power washer to rid the wall of all dirt and dust.
Repair any cracks or blemishes in your wall with concrete patch.
The best concrete paint for patios will feature an enamel finish that resists mold and mildew growth.
Select paint appropriate for your outdoor project.
Clean the concrete wall.
Choose paint for your project.
Not only will painting spruce up dull exterior concrete retaining walls but it will also aid in protecting them against the elements such as moisture.
Retaining walls prevent water or earth from entering the designated area.