IMHO!
If Flex Seal in any form was the ultimate sealer they'd be selling/advertising somewhere/anywhere better than "as seen on tv".
There may be some situation where a Flex Seal product would be great, but on my rv roof isn't where I'd want to experiment using it.
I'd also contact the roof material manufacturer & ask their opinion rather than asking on a forum.
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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