RTV doesn't set up well in low humidity situations- - - -not sure if 60% is enough or not. Try squeezing a bead of the same sealer out on a piece of cardboard on the workbench and see if it sets that way. You might have gotten a bad batch of sealer in that tube. On very dry days, I've had to use a sprtiz bottle of water to get RTV to start curing.
Jerry



"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!