Flex Seal Max is actually liquid rubber in a can. It sprays out as a thick liquid, seeps into cracks and holes, and dries to a watertight, flexible, rubberized coating. Flex Seal coats, seals, protects, and stops leaks fast. Flex Seal Max is perfect for• Roof repair• RV and motorhome repairs• Weatherizing your home• Gutters• Foundation and concrete waterproofing• Indoor and outdoor projects• Sealing cracks and holes• Pools and pool equipment• Car and boat repairs• Bathroom fixes• Furniture repair• And so much more! Flex Seal Max works on wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, porcelain, dry wall, rubber, cement, some vinyls, and more. Dries to a watertight, flexible, rubberized coating Coats, seals, protects, & stops leaks fast | Flex Seal Max, Clear, 17 Oz