hi bud
to be honest i have never left it on there for more than a couple of weeks. i would think that it only goes off when in its wet state and that once dry should be fine. all i can think is that it might dry out over time and applying a quick thin coat over the top would solve that. you will have to ask someone who has done it. i can't see leaving it on there for a few weeks being a problem. something i will try and look into.
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