Structural Foam for chassis stiffening

I looked into it when I was doing sound deadening. There is a body shop applicator than can put the 2 part mix into the voids for wreck repairs. The product was cheap. About $75-100 a tube and that's enough to do an entire car due to expansion. The special hand held gun to inject this was about $1200.

I even went a few local shops but none of them repair the foam, they just leave the voids empty.

Riddler