Many new sign-grade plastics are enhanced for better longevity and endurance in conditions traditional signage materials can’t handle.
HDU Board
Coastal Enterprises: Precision Board Plus™
About HDU Board
HDU (High-Density Urethane) board is a closed-cell, rigid urethane foam board that is commonly used in dimensional signs and tool making. It is available in grades that are stable up to 300° F. Its closed cell structure makes it suitable for outdoor signage, as it doesn’t absorb moisture, and it also won’t crack, rot or peel from outside exposure. It lasts up to 10 times longer than wood, and meets flammability requirements of ASTM D-1692-74 Burn Test, Far 2.5 and Mil P26514.
HDU board can be sandblasted, carved, routed and sculpted. If you can imagine it, you can make it with HDU board!
Polymershapes’ HDU board offerings include industry-leading materials such as high-quality Precision Board Plus. We can meet your needs with standard densities ranging from 4 pcf to 75 pcf. Standard stocking sizes run from 20” x 60” up to 5’ x 10’. Plus, we can help you with fabrication services to ensure that you receive your HDU board ready for use in your applications.
For additional value-added services that can give you a competitive edge, look no further than Polymershapes. We offer a variety of conversion and fabrication services at our local facilities and in conveniently located centers featuring state of the art technology. Our experienced teams are eager to exceed your expectations with best-in-class customer service and convenience.
Make Polymershapes your go-to source for meeting your HDU board needs. Or let us help you select the ideal materials for your needs from our vast inventory of plastics and associated products — Contact your local Polymershapes facility today for more information!
Material Benefits
Environmentally friendly
Lasts longer than wood

Closed cell structure prevents moisture absorption
Easy to prime and paint
Applications & Industries
Display POP Exhibit
You work hard to deliver projects that make lasting impressions for your customers. Polymershapes stands ready to help. Our unmatched inventory of brilliant and versatile products includes everything you need to bring your creative inspiration to life.
Related & Associated Products
PVC-Acrylic
PVC-Acrylic is a thermoformable, high-impact, fire-rated sheet for a variety of aerospace and industrial applications.
Foamboard and Paperboard
Foam and paper boards are staples of the sign and graphics industry. Lightweight and versatile, there are many options for these rigid, printable boards. Applications may include direct printed signage, dimensional lettering, mounting and backing for framing photographs and art, packaging, and more.
Expanded Foam PVC
Expanded Foam PVC sheet is a versatile material, often used in the sign and graphics industry. Expanded closed-cell polyvinyl chloride (PVC) sheets are durable and rigid with a matte finish.
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