Yes, it is possible to seal a basement from the inside, but it's not always the most effective solution like sump pumps for basements. While sealants can be used to prevent water from seeping in through cracks or gaps in the walls or floor, they are not always a long-term solution. Moisture can still penetrate through the concrete, eventually breaking down the sealant and allowing water to seep in again. A better solution is often to address the root cause of the problem by installing a drainage system, such as a sump pump or French Interior drain system. This will help to redirect water away from the foundation and prevent it from entering the basement in the first place.
