Sandblasted & routed signs are a sure way to add class & sophistication to your business image. They can be fabricated using a high density foam, vertical grain redwood or cedar. High density urethane foam is a lightwieght ridged material which is strong, durable and waterproof. Clear-heart vertical grain eastern red cedar or redwood is the preferred material for sandblasted, routed or carved signs. Both are suitable for interior or exterior applications.