Video showing steaming technique to fill cavities and spray foam from a can.
I delisted the last video I did on this since I didn't think I conveyed what I wanted to properly.
People have made themselves quite sick from poorly installed foam - don't be one of them.
After the foam has cured, give it a sniff, if it smells bad, try pull it out and figure what went wrong.
There are a bunch of reasons for and against foaming a vehicle. Figure them out before you do it.