Join Date: Jan 2018
Location: Reading Area Pennsylvania
Perhaps drop some soil/sand onto some wax paper. Then spray your foam onto the wax paper followed immediately by a sprinkling of more soil/ sand. More applications may be necessary as it expands. Wait for it to cure up then peel off of the wax paper.
I've never done this, but it should work in theory. Hell, you could even throw some sticks or whatever into the mix if you wanted to.
Also, keep in mind that there are different formulas of the spray foam. Window and door stuff expands less than the large gap filler.
I am an equipment and tool junkie. I try to keep it simple but.........