Thor Forums

[ducksface]

Not on the ROOF, but on a sign I made just to test flex seal.
The spray liquid had problems in five months and was totally gone in about 15 months.
No trace of it left,
12 or 16 oz can, emptied in many coats, on a 5x14" board.

However.
I think if you used flex seal and then painted over it, the paint would protect it for many years.