There are a lot of products on the market that claim to fix gutters, and it can be tough to know which ones work and which ones don't. Flex Seal is one product that has gotten a lot of buzz, but does it actually do what it claims? From what we can tell, Flex Seal seems to be mostly a marketing ploy. The company has been known for making false advertising claims in the past, and many people who have tried using the product say that it doesn't work very well.

From what I can tell, Flex Seal may work but it's not clear if it will be long lasting. It seems like a lot of people have had good luck with it, but there are also reports of it peeling and cracking after a short amount of time. So before hiring anyone to do this job, I would do some more research on the product and ask around to see if other people have had good or bad experiences with it.