How to Seal Cracked Concrete Before Laying New Floors
- 1). Take everything off the floor that can be removed, and then sweep the floor, removing all dirt and dust.
- 2). Pour concrete degreaser into a garden sprayer. Spray the degreaser over the entire concrete surface.
- 3). Wait 15 minutes for the degreaser to break up the stains and oily substances.
- 4). Scrub the floor with a nylon brush. Then rinse away the degreaser with a hose. Wait at least 24 hours for the concrete to dry before repairing the cracks.
- 5). Chisel open the cracks, making them a uniform 1/2 inch in width.
- 6). Brush out the chiseled concrete with a wire brush.
- 7). Pour concrete bonding liquid into a small bucket, and spread it inside the cracks with a small paintbrush.
- 8). Mix the concrete powder with water as instructed on the packaging until it has the consistency of pancake batter.
- 9). Transfer the wet concrete from the bucket into the cracks in the floor with a trowel. The pointed end of the trowel can be used to pack the concrete into the cracks.
- 10
Sweep the trowel over the cracks so that the wet concrete is level with the floor. - 11
Wait 48 hours for the repaired cracks to cure. - 12
Pour concrete sealer into a paint tray, and then roll it onto the repaired concrete floor with a standard paint roller. Allow the sealer to dry for 48 hours before laying your new floor.
