Flextape (5e Equipment)
From D&D Wiki
Cost: 10gp for small, 15 for medium, 25 for jumbo size
Weight: 2 lb.
Flex Tape (R)! The super-strong waterproof tape! That can instantly patch, bond, seal, and repair! Flex tape is no ordinary tape; its triple thick adhesive virtually welds itself to the surface, instantly stopping the toughest leaks. It even works underwater! Small size 4" by 5', medium size: 8" by 5', large: 12" by 10'