On a hot summer day, nothing quenches the thirst like homemade lemonade. The only downside to whipping up a batch of the sweet and sour drink is that it can stain your concrete countertops. Although it's durable and scratch-resistant, concrete is a porous material if it isn't sealed, and can absorb liquids. If your countertops are sealed, you'll have to be careful not to damage the sealant as you clean.
Wipe up the spilled lemonade as soon as possible, blotting it with a soft, absorbent towel; wiping the liquid may make it spread.
Mix 2 tablespoons of a mild, neutral PH dishwashing liquid into a bowl of warm water. Dip a clean, soft cloth into the soapy water and ring it out. Blot the lemonade stain with the cloth until it's removed.
Clean a more stubborn lemonade stain with a laundry stain remover, which is safe for both sealed and unsealed concrete. Spray the laundry stain remover directly onto the lemonade stain and allow it to rest for two minutes. Sprinkle a small amount of powder laundry detergent over the sprayed stain. Wash the cleaners away with a warm, wet cloth.
Combine 2 tablespoons of hydrogen peroxide with a cup of white flour and add a enough warm water to make a paste to remove old, set-in lemonade stains on both sealed and unsealed countertops. Spread the mixture over the stain and allow it to sit for several hours. Place plastic wrap over the paste to accelerate the stain-removal process. Remove the paste from the countertop using a warm, wet cloth.