09-23-2013, 09:07 AM
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There were a lot of Metaframe copycats back in the day, because, at the time, building a tank was not the "rocket science" it is to most companies today, lol! I would say the lack of marking just shows it was not a Metaframe tank. No way would I trust the old sealant, if you're going to use them, as it was a lot like roofing tar --- had a tendency to bubble under a seam & leak, & it gets brittle over time & will break out. My paternal grandfather used to make his own metal frame tanks & changed to the "new" silicone sealant as soon as it came out, re-sealing his whole houseful of tanks.