HDU or High Density Urethane offers many benefits to interior and exterior signage. HDU is a closed cell foam material that does not absorb moisture making it extremely stable and relatively unaffected by temperature. HDU will not warp, rot, crack, or decompose. It is lightweight and very easy to machine or carve. By sandblasting it, we can simulate a natural wood grain look in the HDU as shown in the image on the left (West End Dental).HDU is considered to be environmentally friendly and meets the LEED requirements for obtaining USGBC and ICC 700-2008 building reqs. In situations where pedestrians may come into contact with the sign panel we don't recommend HDU as it's surface can easily be scratched or chipped. To add structural integrity to the finished product, we'll typically laminate the HDU to a more durable substrate such as Medex, or MDO. Check out the gallery below for a few examples of HDU signs we've made!