Our Eco-Soft Carpet tiles are water resistant, but are not waterproof. These tiles can handle a great deal of water, but may not hold up as well as our other foam tiles. This is due to the tiles having a carpet top. If your basement were to become flooded, we would recommend removing the flooring as soon as possible. The tiles are very light, so they will float in the water. Once you have the flooring removed, we recommend placing the tiles outdoors to air dry. There you can assess the amount of damage that has occurred to your flooring. These tiles are mold and mildew resistant, so any staining that occurs on the tiles is usually due to alkali coming up from the concrete.