[Bill]

Aquaseal will cause stress points because it is barely flexible. Neoprene glue welds the two pieces together. Inner tube patch kits are an easy source of rubber glue.
If possible practice once on a scrap piece. Seperate the two sides the best you can, rinse in fresh water and dry. Apply a thin layer of glue to both surfaces, wait 5 minutes and apply another thin layer. After 10 minutes carefully join the two surfaces (when they touch you cannot adjust them) and apply pressure to insure that they are in full contact. Drying time appears to be zero.