How long does flex seal last? Flex seal is great for several different projects around the house? It can be used to seal cracks and holes in both metal and concrete, making it perfect for fixing leaks in your home. Flex seal can also be used to protect your belongings from moisture damage. Simply apply a flex seal to any surface that needs protection, and it will create a durable barrier that will keep out water, dirt, and other debris.

Flex Seal is a rubberized sealant that can be used on various surfaces, including metal, glass, wood, and plastic. It is typically used to seal cracks and leaks and prevent moisture damage. Flex Seal can last for many years if applied correctly and properly prepared on the surface. If you are planning on using Flex Seal, it is important to follow the instructions carefully and allow the product to dry completely before using the area.

Yes, Flex Seal will hold air when used as directed.