Stainless Steel Flue Pipe - Sealing

pudds

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I want to seal around the 6" ss flue pipe where it exit's the concrete boilerhouse to prevent mice getting in. Not knowing if stainless steel expands and contracts, would it be safe to seal round the pipe with a little bit of ordinary cement :confused:
 
Yes. And it should be done to prevent flue gasses entering your wall cavity
 
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