Does the EMSHIELD DFR2 require a sealant band injected from the underside along the in tumescent bellows-to-substrate interface?
NO The EMSHIELD DFR2, fire rated, watertight, traffic durable, expansion joint system was deliberately tested to UL 2079 without intumescent-sealant injected at the bondline from the underside. The system passed UL 2079 with no problem in this configuration. The goal of the DFR2 project was to produce a fire rated expansion joint that could be installed entirely from the top side of a deck without the need to access the bottom side. This goal was achieved.
