Expanded Polystyrene (EPS)

Primary Applications:

  • Flotation
  • Insulation
  • Packaging
  • Void Fill
  • Sculpture
 Expanded Polystyrene Packaging

Material Description:

    Expanded PolyStyrene (EPS) ,commonly called styrofoam, consists of small white foam beads that are exploded by steam and bonded into blocks. It is available in several densities (3/4#, 1#, and 2#) and available in thicknesses up to 36". Bun stock is approximately 36" x 49" x 98".
  1. 3/4# EPS is a light grade material primarily used for packaging, void fill, sculpture, and stage sets.
  2. 1# EPS is primarily used for packaging inserts (e.g., corner pieces), flotation, and light insulation. A 24" x 48" x 96" slab of 1# EPS will float 4500 #'s. with a water absorbtion of .1% to 1.9%. 1# EPS also has an R factor of 3.85/in @ 75 F and 4.17/in @ 40 F.
  3. 2# EPS is primarily used for heavy packaging requirements and insulation. 2# EPS has a R-factor of 4.17/in @ 75 F and 4.76/in @ 40 F.

Warning: this material must not come into contact with solvents, Use only waterbased paints and adhesives.(ie. wood glue)

(# = pounds)

(density = pounds per cubic foot)

(R-factor= Thermal Resistance Factor is a measure of the ability to retard heat flow. The higher the "R" the better the insulating value)