Wabo®FireFlex is tested, witnessed and approved to accommodate +/- 50% parallel lateral shear and multi-directional seismic movement. FireFlex incorporates high temperature fire resistive blankets, stainless steel foil, cycling shields and galvanized edge retainers. Additionally, Wabo®FireFlex is cycle tested to exceed ASTM E-1399 and is listed with Underwriters Laboratories for Class II and III movement classifications for standard and seismic lateral shear. For joint openings 2" and larger.
UL Listing for HFW-20-2 can be found here... XHBN.FW-D-3003