The U.S. Dept. of Homeland Security has certified Hygard BL80 Shock-Wave Sentinel as a promising anti-terrorism technology. The shield is transparent, but can be decorated. Laminated polymer panels are attached to a steel frame supported on a concrete foundation, with a 7-ft.-minimum buffer space between the building and the panels. It withstands 80-psi peak pressure and 380 psi-msec impulse, exceeding explosion resistance standards by 30%.
Bayer MaterialScience LLC