Southern Pacific Switching Layout

[Justinmiller171]

Thanks Gary,
But is Polyurethane foam as good as the Polystyrene foam that most layouts use. I heard that it is less rigid and more toxic than Polystyrene.

Avoid the stuff with the little white beads at ALL costs. It's toxic when cut, and flies EVERYWHERE.

Use the blue or pink stuff, 2" preferred.

I used the stuff with the white beads on my 4x8 I built a few years ago and now my train-room is littered with those little white beads :x

Is polyurethane foam the kind with the little white beads?