The EZ-Path® Cable Tray Retrofit Device is designed to restore the ratings for overfilled cable tray penetrations. The device features a built-in fire and smoke sealing system that installs around existing cable trays and fastens to the barrier surface. The EZ-Path® Cable Tray Retrofit Device consists of a heavy gauge galvanized steel housing containing intumescent materials that expand rapidly when exposed to fire or high temperatures to close off the void area. Its unique two-piece design installs around existing cable tray penetrations in fire rated walls restoring the fire-rating of penetrations even when loaded to 100% cable fill.