If you notice cracks in the concrete of your basement floor, this problem should be taken care of as fast as possible. Luckily, there are several DIY solutions to this common problem. The best way to repair any cracks in your basement floor is to use Concrete Floor Filler. This product is not actually concrete, but a very similar substance that bonds to concrete and seals cracks, its also widely available in home improvement stores. Concrete filler makes sure the cracks won’t expand and protects against further cracking by adhering to the existing concrete. This product can be easily applied with a spade/trowel or if the crack is small enough, a caulk gun. If you notice water seeping up through these cracks, the problem is serious and may require professional help. Mar-flex recommends DryPatrol for these problems.