FLEX SEAL® Liquid is a thick rubberized liquid that you can brush, roll, dip or pour. It starts out as a thick liquid and dries to a strong, flexible, watertight, rubberized coating that protects and helps stop leaks fast. Unaffected by weather. In extreme heat or cold, FLEX SEAL® keeps its hold! Stays flexible and pliable while protecting surfaces from corrosion. Seals out water, last for years!