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Foam around heat vents

1325 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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Foam is fine there. You just can't use it around chimneys etc. (the exhaust side of combustion appliances)
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