Would that actually work? Maybe some improvement with side impact, but if the type of expanding foam that builders use, it would just flex and give and turn to mush..... I filled the cavities in my glass fibre gp bodykit that I got from chester with expanding foam, and it keeps the gravel out of the side skirts, but thats about it... 2 months in and it is falling apart.
So no.... I doubt it would do much good. What about concrete?
Conk
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