Flex Seal Liquid MAX is a thick liquid that dries to a flexible, watertight rubberized coating that protects and helps stop leaks fast, now with 150% more coverage. Flex Seal Liquid MAX can be brushed, rolled, dipped or poured and creates a flexible rubber barrier that blocks out air, water and moisture. Non-toxic, non-flammable, no harmful vapors, UV, chemical and mildew resistant. Flex Seal Liquid seals and protects form the elements, and extreme temperatures.