I’ve had 2 attempts at resealing the waterrower kits, followed instructions precisely, but both failed. I’ve successfully worked on fiberglass kayaks so I’ve had a fair bit of experience with such repairs. I’d not waste money on a kit. I do notice now that some retailers say that the kit is not suited to total seal replacement, just spot repairs. This may reflect customers failures with the kit. I’m in the tropics, so that may have been a factor in my failed attempts but I doubt it. I’m going to glass around the entire seal area. Not concerned about lack of access to tank internals. Worst case is that I eventually need to buy new tank.