looking to try this out on a project car and just cant really find a solid answer on what i should be looking for. not really sure if i should put this in here or over in road race forum but figured id give you guys first shot. TIA

 

i have heard of people using that expanding foam like you would buy at a hardwae store. im guessing this is for a road race car or something?

 

Theres a big difference between regular expanding foam and structural foam.

Foamseal makes an automotive specific structural foam. Their website is http://www.foamseal.com but it seems to be down at the moment.

 

boat supply places have the 2 part foam