FWIW I posted the same ? on RC and this reply seemed to be the most sound and got conscensus from others as being the safest bet.
"It will set in 30sec, but it won't fully cure for 2hours above 60degrees.
I'm a purchasing agent for a plumbing company I called my Oatey sales rep about using their products with Saltwater tanks and he recommended that after 2 hours rinse the parts throughly with ro water and allow it to air dry."
I hope that helps anybody else that may have the same question
Cheers
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Scott