Although the title says kit I am mainly concerned with the glue. What are folks carrying on the water other than tear aid to patch with? Mainly concerned about the shelf life of the glue. I hate to buy it and throw it away after a year. I would rather find a quality temp fix and then buy the stuff once home. If there is no good alternative ill just suck it up and get the stuff now.
Properly stored stabond will last you two seasons. If it has never been opened and hasn't had freeze/ thaw cycles there is no reason you cant get two seasons out of it. I know it says it expires after a year but lots of things have bullshit expiration dates on them. It is there to cover the manufactures ass. If they didnt put it on there some guy would let his glue sit outside all winter and then bitch the next season when it was bad.
That said, there really is no rip that you are going to fix on the side of a river to big for tear aid if you have enough of it, most peoples repair kits dont have enough material or glue to do something huge anyway. It is a bitch to do an inside patch with Tear aid but it can be done. I am confident I could fix a 5 foot rip with some thread and tear aid well enough to float a boat out of anywhere. I carry a crazy repair kit but it has been years since I put anything on anyones boat on the side of a river besides tearaid.
I have found that storing the glue in a closed ammo can keeps it good for a couple of years. If it is still runny it is still good. I do not believe the accelerator has a shelf life. I always carry glue, and plenty of hypalon. Once on the Middle Fork a guy packed the fire pan on the floor of a bucket boat at 2 feet on the scale. Needless to say we had to patch about 20 of the fifty holes he suffered. The ones that you couldn't put a finger through were fixed with tear aid. Luckily we had a boogie board on the trip, which when wedged between the upside down boat tubes and the floor made a terrific surface to apply pressure to the floor patches.
Both are handy to have. The StayBond (2 Part) is better for larger repairs or seems and shore adhesive is good for adding d rings on the fly or fixing a small leak. $60 and your life will be much easier.