CORAFOAM® High density

High density CORAFOAM® (HDU) is an innovative polyurethane substrate used for a variety of applications in the signage, modeling, aerospace, composite, architectural and design industries. With its excellent workability, grain-free consistency and broad range of densities (4 lb/ft3 through 31 lb/ft3), CORAFOAM® provides solutions to craftsmen and engineers alike.

These characteristics, combined with polyurethane natural resistance to atmospheric agents, most solvents, and moisture, make CORAFOAM® polyurethane an ideal replacement for wood and other materials in signage, patternmaking, composite layup tooling, thermoforming, and prototyping applications.

Additionally, it’s resistance to mechanical stress and exceptional insulating qualities have proven it a valuable asset as a support in the cryogenic field.


DUNA-USA CORAFOAM® U polyurethane can be cut with almost any type of tool. Its closed cellular structure and absence of fibers or granular structure result in crisp, excellently defined edges after fabrication.

It is also impermeable by any type of liquid, including water and solvents, making it much better suited for severe weather conditions or harsh marine environments than many other materials.

Request a sample of CORAFOAM® polyurethane here or contact us at: (281) 383-3862 with any questions.

Download our comprehensive case study comparing CORAFOAM® vs the leading brands of HDU in terms of cell structure, strength, and manufacturing technique. Discover why CORAFOAM®, produced with DUNA’s specialized “continuous” production technique is the highest quality on the market.

CORAFOAM® Density (lb/ft³) Initial thermal conductivity at 75°F (BTU·in/hr·ft²·°F) Parallel compressive resistance at 70°F (psi) Fire behaviour Operating temperatures (°F)
EN 1602
ASTM D1622
EN 12667
ASTM C 518
EN 826
ASTM D1621
U 40 4 0.18 83 n.a. -328/+176
U 60 6 0.19 148 n.a. -328/+176
U 80 8 0.20 230 n.a. -328/+176
U 100 10 n.a. 290 n.a. -328/+176
U 150 15 n.a. 638 n.a. -328/+176
U 150 F 15 n.a. 590 FAR 25.853(a) 12"/60": PASS -328/+212
U 200 20 n.a. 1044 DIN 4102 Class B3 -328/+176
U 310 31 0.50 2436 DIN 4102 Class B3 -328/+176