Depends on type of wader: neoprene is different from the old rubber waders which is different that the "slicky" waders. I repaired my son's waders this year with a patch kit from - I think - from Bass Pro Shops. I am sure you can get them other places. It consisted of a patch and some glue. Very easy and it worked. For neoprene waders get the neoprene "glue" to seal the hole. (Unfortunately I have had to use that on my own waders.)