Intumescent firestop to prevent the spread of fire through electrical boxes. 

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Metacaulk Cover Guard
Manufacturer RectorSeal Fire Stopping Products
SKU: CG

Highly intumescent, the  Metacaulk® Cover Guard™ will expand and prevent the spread of flames in an electrical box. 

Metacaulk Box Guard Firestop
Manufacturer RectorSeal Fire Stopping Products
SKU: BG

Metacaulk® Box Guard™ is a fire-rated pad inserted on the inside back wall of an electrical box and is a highly intumescent firestop material. 

Metacaulk Fire Rated Putty Sticks and Pads
Manufacturer RectorSeal Fire Stopping Products
SKU: PuttySticksPads

Intemescent putty pads and putte sticks are moldable to seal around through-penetration openings to prevent the spread if flames, smoke, gas and water.