Sign•Foam - High Density Urethane Advantages of Using Sign•Foam SIGN•FOAM is simply the next step in the evolution of High Density Urethane within the sign industry.  It only seems fitting that SIGN•ARTS Production Corporation, the company that introduced HDU to the sign industry, be the company that perfects it. SIGN•FOAM3 is a high density polyurethane board that is unlike any substrate you may have used.  It is lightweight, yet remarkably strong and durable.  SIGN•FOAM3 possesses exceptional machining characteristics which make it compatible with all your current manufacturing processes.  In fact, you may already own most of the equipment needed to fabricate with SIGN•FOAM3.  The closed-cell structure of SIGN•FOAM3 makes it completely waterproof, therefore well-suited for any outdoor application.  SIGN•FOAM3 is unaffected by temperature or moisture, and will not rot or decompose.  SIGN•FOAM3 is highly chemically resistant which allows for the application of any paint finish.  These benefits give SIGN•FOAM3 a virtually unlimited life span in any environment, inside or out.  The SIGN•FOAM brand has proven itself as the only reliable HDU available today. You will not open a sign trade magazine today without encountering various articles about sign-making with HDU, or High Density Urethane.  An overwhelming majority of sign-making contest winners are using the same revolutionary substrate . . .they are using SIGN•FOAM. Call R S Supply Today at (800) 782-4467 for your Sign Foam Needs.