Our Flood Protection liquid starts out as a liquid. It seeps into gaps, cracks and openings and dries to a strong, flexible, rubberized, watertight coating. It seals out water, while remaining flexible. Flood liquid should be used primarily as a final layer of protection to help seal any small pinholes or openings that may have been missed. Brush a generous amount directly on top of our other Flood Protection products. When applying flood liquid, make sure each coat is wider and overlaps previous layers of our Flood Protection products. Once flood-waters recede, our flood liquid can be easily removed.