Vinyl underwater tape
Also: underwater tape
Some vinyl tapes even stick to wet surfaces. Luc Mehl includes them in his minimal repair kit.
He names products such as Gorilla Waterproof Patch & Seal or Flex Tape that work on wet boats. He reports seven successful applications and one failure, which worked on a second attempt after drying the tube.
Sources and further reading
Research as of 13 Nov 2026. We have marked manufacturer information as such.