Use a wire brush to remove loose pieces and debris from the cinderblock walls.
Follow the mixing instructions provided with your waterproofing material. Slowly add the liquid (water + MasterEmaco A660) to the powder (MasterSeal 581) in a 5-gallon bucket.
Mix thoroughly using a 9 Amp Corded Spade Handle Mixer until you achieve a thick pancake batter consistency.
Let the mixture sit for a few minutes.
Use a masonry brush to apply the mixture evenly onto the cinderblock walls.Work quickly to ensure proper coverage before the mixture dries.
Let the applied coating dry completely as per the product's instructions.
Ensure proper ventilation during the drying process.