If you did this on my crew, you would be fired for callous disregard of the code. You said it yourself, it is not allowed nor listed for this purpose.
I started filling sealoffs with silicone this week. And let me tell you it
> feels so good to do this after 30 years of using that chico s*it. Sure
> silicone doesn't meet the UL requirements, because the makers of the
> sealoffs do not make the silicone and will only get their sealoffs listed
> using their obsolete mix and pour powders. We all know silicone will work,
> but the industry can's give up selling the powders. Well that stopped today
> and it felt so good. It almost feels as good as stepping on a plastic
> cabinet and watch it fly into pieces. Or ratchet RMC so hard into a plastic
> hub that the hub strips. ha, ha, ha. TGIF.....
>
>