Flex Seal is an American brand of adhesive bonding products made by the family-owned company Swift Response in Weston, Florida.

[1] Founded on February 28, 2011,[1] the company employs 100 people led by its pitchman and Chief Executive Officer Phil Swift.

[1] Flex Seal has become a popular internet meme due to its television advertisement demonstrations of the product in absurd and exaggerated situations, as well as Swift's enthusiasm and loud voice, much like that of late Billy Mays.

[5] The company has also made several ancillary products over the years, including Block Out, Slick Fix, Maximum Traction, Foamazing, Blast Off and Winter Wax.

A 2017 collaboration between Inside Edition, the Good Housekeeping Institute and a Lake Hopatcong marina recreated this experiment and found that although some water began to collect in the repaired boat, it "remained seaworthy" with a driver.