Our Flood Protection spray starts out as a liquid. It seeps into gaps, cracks and openings and dries to a strong, flexible, rubberized coating. It can be used as a primer coating for hard-to-reach areas or as a final coat of protection to help seal any small pinholes or openings that may have been missed. It blocks out water, air and moisture, while remaining flexible. Once flood waters recede, our flood spray can be easily removed. Flood spray can be used as a primer coating, prior to applying our other Flood Protection products, or as a final coat of protection to fill any small openings or pinholes that may have been missed. When used as a primer, apply flood paste and flood liquid on top of the flood spray. When used as a final coat, apply flood spray on top of all previous layers of Flood Protection products. We recommend you always use flood spray in combination with our other Flood Protection products. Apply multiple coats of flood spray to seal hard-to-reach areas, such as door tracks, seams, windowsills, small openings, corners, irregular shapes and more.