The alternative method to make crumb rubber panels is to employ a spray technology. Here the spray technology is referred to as using a spray or blaster device that can pressurize and disperse the mix of crumb rubber particles with a bonding agent onto a base substrate. A panel is formed after spraying enough volume of the mix on the base substrate and the solidification takes place as the bonding agent becomes dry, and a bonding strength is developed between the bonding agent and rubber particles. It can be seen that this spray process is a coating operation.

The advantages of the spray technology are as follows:

1 Easy control on the panel size and thickness
2. Easy implementation of panel surface texture/contour designs
3. Mobility of taking the spray or blaster device to highways and spraying to
existing highway noise barriers.
4. Easy handling of the large volume of coatings.
5. Easy repair and maintenance of sprayed panels
6. Easy coloring of the panels