Wet basements are often caused by poor foundations, cracks in the concrete, lack of sump pump or bad basement waterproofing. When finding the solution for a wet basement, keep in mind that there are many techniques and products on the market. The best bet for filling in a crack on the wall or floor would be an epoxy injection which binds both sides of the cracks and creates a tight bond. Some times your basement will need a sump pump or waterproofing coating on the exterior of the basement foundation. If your basement has a crack, leak or too much moisture, it is important to have a professional concrete repair expert look at your situation and fix the problem.