Video answer: Gorilla glue - worlds best waterproof glue
Top best answers to the question «What is the best glue to use underwater»
Mr. Sticky's® Underwater Glue is an excellent adhesive that can be applied underwater! It bonds well to plastics such as PVC and ABS and traditional materials such as tile, concrete, fiberglass, rubber, wood, and metal.
Video answer: Can glue dry underwater?