Smoothfoam is our brand name for high density molded EPS or Expandable Polystyrene. It is a smooth, closed cell foam, most commonly referred to as smooth Styrofoam ®. It is molded from tiny beads into many shapes like polystyrene balls, bells, eggs, miniature fruit shapes and more. Because of its smooth surface it is excellent for painting. It is also very durable, making it great for projects requiring pins or glue.
Smoothfoam is made from EPS (expandable polystyrene). It can be manufactured in different densities. Our High Density Smoothfoam items are over 4 lb/ft3 density and our Low Density is 1.25 lb/ft3.
How is that figured out? If you had a 1 cubic foot of our low density product it would weigh 1.25 lbs and the high density would weigh 4 lbs. High density Smoothfoam items are more durable (less dents and blemishes), and have a better, smoother finish because of the smaller beads. Low Density items are softer. So better for hot wire cutting, projects that require sticking items (pencils, skewers, etc) into it.