Prepare the bleach mixture by combining bleach and water. Here’s how to clean a sealed concrete floor: Pin on Ideas for the House Fill a bucket with 1 gallon of warm water and 3/4 cup of liquid bleach. How to clean concrete floor in basement youtube . Fill a bucket with warm or hot water, adding a squirt or two of dish soap. Use a concrete cleaner to prepare the concrete for the sealer. Sweep the floor to remove loose debris such as dust, dirt and leaves. Finish by using one of our cleaning recipes to get the concrete clean of all residue. What it is, how it is caused, & how to get rid of it. Rinse the floor with clean water to remove any leftover soapy residue. Sweep the concrete floor to remove dirt and other residues and pick it up using a dustpan. In our line of organization, we come across a great number of home owners who express concern about a white, flaky substance that. Sweep any dust or debris from the concrete floor with a broom, pick it up in a du...