Concrete is a durable surface, but it will develop cracks over time. In some cases, the surface becomes rough and unsightly. Fill concrete cracks before they get too bad, or the cracks might enlarge to affect the entire concrete floor. Products are available today that allow you to match the material you use to fill concrete cracks with the color of the concrete floor so that the repair is almost unnoticeable. Once you fill the cracks, give your concrete a shiny finish by polishing or clear coating.
You should always fill the cracks to prevent them from getting larger. Treating the concrete with a densifier will slow the crack process.