I got the first coat of pond shield on my 600 plywood tanks and will be adding the fiberglass strips tomorrow. I watched Joeys video and he used cloth and it worked fine for him, I know on the pond shield videos they use the mat. I was going to use the cloth but others on here used the mat and feel its stronger. I would rather use the cloth as it will be easier and my structure is really solid and do for see any flexing, just wanted to get some input before I start