I’m a residential construction tradesman- specializing in custom showers- I know about many adhesives, and this one works very well when properly used- in winter storage our above ground soft sided pool had a rodent chew an inch and a half hole (think Oreo size) through the sidewall- I originally attempted a patch with to part epoxy as it’s what I had on hand- epoxy binds to almost anything except vinyl-I purchased the large repair kit, and attempted the repair underwater, I cut a small price of packaging plastic ( the annoying display packaging used to hold products on display hooks kids toys come in that’s impossible to open) about a half inch bigger than the hole to provide support so the patch didn’t balloon out the hole- it overlapped the hole 1/4” on all sides and nearly stopped the large leak- and scrubbed the surrounding surface with a nylon scrub pad- then I cut a patch about 2” bigger than the hole allowing 3/4” coverage. I applied the adhesive and let it get tacky, which happened immediately, and applied another layer and placed the patch- it didn’t seal no matter how hard I tried to “push the bubbles out”-I recorded the kit and bought the 4 oz glue can- when I removed the bad patch it removed the layer of vinyl that is laminated over the fiber in the side wall everywhere it was applied well enough- I placed a pre cut piece of plastic over the hole as the old one came off with the patch- I cut a new vinyl patch from the kit and applied the adhesive again- this time very generously- ideally I’d say 1/8” of glue- this stuff cures fast and the added material keeps it pliable don’t be shy with the glue- slapped that baby on and gently pressed and rolled the glue to the edges, and repeated that procedure multiple times over 10 minutes as the glue stiffened. I’m sure somebody with more dexterous hand could make a prettier patch but I’m confident it will hold- I believe the kit would have adequate glue for pin holes or slices, but for a gaping hole I wish I’d bought the can the first time- it comes with light duty clear vinyl material so now I’m set up to repair the kids inflatable toys all summer long-FYI - I got the glue on me the second time around and surprisingly it was easily scrubbed off my skin- avoid it if you can but don’t panic- it’s not like pvc or abs glue- a $20 kit saved me $800 on a new pool liner