SpecSeal EP Powershield electrical box inserts are used to protect an electrical box and maintain fire-resistance ratings of wall assemblies, when the horizontal separation between metallic boxes on opposite sides of the wall is less than 24 in (610 mm), the size of the box exceeds 16 in2 (103 cm2), or the area of such openings does exceed 100 in2 (645 cm2) for any 100 ft2 (9.3 m2) of enclosure wall area. See CLIV for more information.
- Tested in boxes up to 4-1/2 in. x 14 in. x 2-1/2 in.
- Suitable for Steel and Plastic Face Plates
- Easily preinstalls before shipping to the jobsite
- Eliminates the need for Putty