Based on reviews and hands-on testing, this 1-quart bottle can fill 38 linear feet of cracks up to ½ inch wide and ¼ inch ...
The microbes can grow inside of cracks and form a mineral crystal layer that serves as a stable, watertight filler ... "The great advantage of self-healing concrete is that the concrete is ...
If you see visible cracks, unwanted gaps, or uneven spots, then fill them in with concrete filler or self-leveling concrete mixes. If you have an asphalt driveway, use an asphalt crack filler.