Abstract: An electrical box cover for an electrical outlet box includes a back and four sides extending from the back. The back and the four sides define an interior of the box cover that is large enough to cover the exterior of the electrical outlet box. The box cover is made of a soft, flexible material that can be molded to a shape of the electrical outlet box and that has certain elastomeric qualities so that the box cover can be slipped on to the electrical outlet box and installed, thereby providing additional sound and fire protection to the electrical outlet box. The cover box may also include a flange surrounding the opening in the box cover to cover any gaps around the cutout of the wall. The box cover may include one or more knock-outs that correspond to one or more knock-outs in the electrical outlet box.

Abstract: An electrical box cover for an electrical outlet box includes a back and four sides extending from the back. The back and the four sides define an interior of the box cover that is large enough to cover the exterior of the electrical outlet box. The box cover is made of a soft, flexible material that can be molded to a shape of the electrical outlet box and that has certain elastomeric qualities so that the box cover can be slipped on to the electrical outlet box and installed, thereby providing additional sound and fire protection to the electrical outlet box. The cover box may also include a flange surrounding the opening in the box cover to cover any gaps around the cutout of the wall. The box cover may include one or more knock-outs that correspond to one or more knock-outs in the electrical outlet box.

Abstract: An intumescent firestop device having a layer of non-curing moldable two-stage intumescent composite and a restraining layer. When the firestop device is installed around a pipe near the wall opening through which the pipe runs, the intumescent composite exudes into the annular space between the pipe and the wall opening thereby forming a cold-gas seal. The composite is a two-stage intumescent composite that contains two different intumescent components that begin to intumesce at two different temperatures to form a hard char.