What is Expanded Polystyrene?

RayLite expanded polystyrene insulation meets today's need for more efficient methods to conserve energy. It is the logical insulation choice for residential, commercial and industrial applications because it provides the highest R-value at the lowest cost.

RayLite is manufactured from an expanded polystyrene base material plus a flame retardant additive. When expanded by heat, it produces a closed cell, resilient, lightweight foam plastic with a density range between 1.0 - 3.0 pounds per cubic foot (pcf) for most construction applications.

After molding, the cured billets are cut into slabs, sheets or other shapes, in a range of densities to yield the necessary properties to meet the highest insulation specifications at the lowest cost. RayLite (1.0 pcf) provides a typical R-value of 3.85 per inch (R-factor + 0.26) at a mean temperature of 75F (R = 4.17 per inch at 40F).

Because of its cellular structure, the R-value of RayLite is permanent. It will operate efficiently for the life of the building.

RayLite is a great moisture-resistant insulation too. Because it "breathes", no costly venting is needed to prevent moisture within the walls. Even when force-saturated to 10 times its dry weight with moisture, expanded polystyrene retains 80% of its original R-value.

RayLite also resists severe temperature changes, and is unaffected by natural elements.

RayLite expanded polystyrene is an example of high technology meeting the challenge of our energy-conscious environment.

RayLite Brand is the trusted, proven insulation that is consistently specified by building contractors and architects throughout the United States, and it's easy to see why!

1. RayLite, in all its densities, is the best value per R-factor of all other rigid foam insulation.
2. It complies with all Federal specifications governing quality and performance which cover expanded polystyrene insulation.
3. It is U.L. tested and classified.
4. It meets or exceeds all aspects of the FTC home insulation rule.
5. Its manufacturer stands behind every claim for its specifications and performance.
6. RayLite is manufactured using no CFC's or HCFC's and is recyclable.

DiversiFoam Products, manufacturer of RayLite, has been developing, producing and marketing EPS products for insulation, construction, packaging and OEM applications since 1966. DiversiFoam's state-of-the-art manufacturing facilities and extensive distribution systems assures you of quality products when and where you want them.