Do you have a hole in your drysuit ? Is it big enough that you want to re-enforce it ?
Choose from 3 different size patches made from drysuit material. Aqua Seal would glue these in place nicely but you must give it 24 hours to dry completely.
Large circle 3.5 inches
Small circles 1.5 inch
Rectangle 4.75 inches by 1.25 inch