Sealing a resonator using high heat silicone, on my 2012 Buick Regal

As the title suggests. I saw a few holes in my resonator, and I decided to fix those using high heat silicone. I patched it up using the silicone and a few other places on the resonator where the resonator had split. I left it to dry overnight and harden up.

Do you think this could work? Do I need to apply heat for it to cure up?