RTV as muffler patch?

The liquid I bought was the big tube with the screen patch, Didnt use the patch but the stuff was very thin, applied and smoothed it over as a bead, takes 4hrs to dry, they say to heat it up after 4 hours to cure, ill just idle it for a few minutes. so far so good. brace is holding firm and patch is setting up. trial start was butter smooth with no leaks.