METACAULK Firestop Sheet,Black,Intumescent,3.69&L

Firestop Sheet; Fire Rating 3 hr; Fire Resistance Type Intumescent; Firestop Type Gasket Insert; Overall Width 0.25 in; Roll Length 3.69 in; Color Black; Features Dielectric Breakdown Voltage 22V/Mil; Non-Conductive; Flame Spread Index 5; For Use On Electrical Boxes; Outer Material Intumescent; Resistance Properties Fire Resistant; Sheet Length 3.69 in; Smoke Developed Index 5