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Foam around heat vents

1329 Views 4 Replies 3 Participants Last post by  brockmiera
So I am in the process of putting up XPS in my basement, cutting small pieces and putting them in the joist cavaty's against my sill plate (I think thats what its called) Anyway I was reading the can of great stuff that I am using to seal up around the foam and it says it is very flammable.

To that I ask. Can I use it to seal up around the heat ducts that are going upstairs?

I can post a few pictures later today.
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Yes you can but it's more often done with foil tape or mastic.
A heating duct at the end of the run is never going to get hot enough to cause it to burn.
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