Flex Tape is supposed to work on all kinds of surfaces. In the Flex Tape commercial, Phil Swift said Flex tape grips on tight. It is supposed to patch, seal, and repair almost any product. It was tested on leaking pipes and held up.
Does Flex tape work under water?
Flex Tape has a triple thick adhesive that is designed to be applied to surfaces that are wet or dry, even underwater. For best results, start with a clean surface free of grease, oil, dirt and algae.