Hi all,

I am looking to foam in sections on my kit and would like to use spray foam. I know to use closed cell foam, but question what type. I see that the semi ridged spray foam used for exterior windows is rated to 240 degree F. I am thinking that if my interior gets to that temperature, I have other issues besides worrying about the foam burning. I want to foam in the roof fiberglass to the Fiero and to foam up the rear deck area after the firewall and the B-pillars.

Questions:
- What type of semi ridged spray foam to use?
- Would exterior home grade foam used for sealing windows not work?
- Should I spend a lot more for marine grade foam?