I'm still hoping it will firm up as it was applied in low 40s temperatures, and then it rained shortly after that.
It seemed to begin curing a half an hour after applying as it did clump a little when spread, but last night it felt about as soft as it came out. I was hoping there might be a spray curing agent I could hit it with since I don't think I can remove it.
Perhaps it's just thick enough to hold up to whatever air pressure the firewall is exposed to and the repair will last. I'll take the car on the highway in the next couple days and see if the repair holds. If it does, I'll put the interior back together and stop worrying about it until/unless condensation begins showing up again.
I'm reading online reports of some environmentally friendly silicone that expires soft instead of expiring hard. I didn't think that was possible, which is why I figured if it was soft, it was good.
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