Select paint appropriate for your outdoor project. You will need a paint that is resistant to moisture and sun exposure. Outdoor concrete paint is available for outdoor projects. However, an oil-based paint also may work for your needs. Pick a paint for your indoor paint project. Basement concrete paint is available in many paint and home improvement stores, however you also can use an interior acrylic paint for the project.
Tape plastic sheeting to the wall. Attempt to get the sheeting as air-tight as possible. Check the plastic after 24 hours. If moisture appears within the plastic, you will need to seal the wall. If no moisture is present, the wall is already sealed.
Concrete sealer prevents water from absorbing into the concrete and helps prevent stains. [6] X Expert Source Gerber Ortiz-VegaMasonry Specialist & Founder, GO Masonry LLC Expert Interview. 10 March 2020.
