In alt.home.repair, on Sun, 14 Feb 2021 14:17:32 -0500, Mario
wrote:

Anyone use any of the Flex products such as Flex Glue and Flex Seal?
Does that stuff really work?

https://www.google.com/search?client...x-seal+reviews

For example:
https://www.sitejabber.com/reviews/getflexseal.com
1.4 stars out of five from 99 reviews
https://www.consumerreports.org/cro/...heck/index.htm

but Amazon reviews are better.
https://www.amazon.com/Flex-Seal-Rub...ews/B00LBE1CJM

There are more that I did not look at