Surf shops sells AuqaSeal works like a charm...........
Tip for finding those pin hole........
Place your waders on a hanger in a dark room ( closet ) - shine a bright high intensity flashlight in the waders boot & make your way up each leg. The light will shine thru the pin hole, you can mark the spot by shoving a toothpick in the hole - Repair with Aqua Seal.........ICM