Pitted outershield on insulated chimney

[Ember2020]

Hi there,
I got a free chimney for my garage and it is pitted in some spots (tiny holes through the stainless outside case)
Inside is 100% fine and clean as a whistle.
Can I just fill the hole with high temp silicone and wrap the case with 3M hi temp foil, or wrap chimney with tin and gear clamps?
I want to put this in my attic but want to be safe so wondering some other peoples options.
Thanks!

And I’m glad to finally be a member of the forum (I currently heat my main house with wood so I have little experience e)

 

[kennyp2339]

Negative, the outside shield is compromised, if you have a chimney fire (they can exceed temps of 2000deg f) the silicone will simply burn away and theres the potential of heat being exposed through and you lighting the inside attic & outside roof of your garage.

 

[Ember2020]

Ok thanks for the reply!

 

[begreen]

Yes, that chimney is shot. There is the possibility for moisture to seep into the insulation which would compromise its temp rating and ability to contain heat.