 It is called Handi-Flow Pour in Place (Slow Rise Formula) There are two cans that mix at the nozzle. Cost is about $230. La-Z-Link You can use spray can foam for 'small' cavities; and ones with a lot of openings so it can get the air it needs to cure. But if you put this stuff into a closed frame rail... it will not cure, and it becomes a messy liquid goo. Dont believe me, just try it in the front rails in your wheel well. Then a week later unscrew the fiber underpans. Watch the goo come dripping out from the bolt holes.
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