Haven't been around for a bit and just getting around to catching up on the forum. Boxer 100 is a slow acting cement. The stuff that normally comes with the patch kits I've tried will attack the vinyl and curl it real fast so you have to get it in place fast. I did a deep end patch years ago and it's still holding. Took time to place it, squeegie it, then drop a sandbag on it so I needed the slow acting stuff.
Al