The Box Seal is a wall plate gasket that serves as an acoustic wall plate seal and fire prevention measure, effectively plugging spaces around wall outlets.
The STC Hi-Sabin Panel controls reverberant noise due to exposed ceilings, and offers more savings than other types of sound absorption panels.
The STC Acoustic Sleeper helps to prevent impact noise from reaching floors below.
The STC Mullion Seal closes the gap between a window and wall partition to stop sound from traveling trough these spaces.
$192.00 Bag of 40
$ 4.80 per seal
The Duplex/Decora Box Seal fits NEMA devices and standard size wall plates made by Hubbell, Leviton, Lutron, Mulberry Metal, Pass & Seymour/Legrand. Cooper plates for duplex receptacles are not recommended.
The Duplex/Decora Box Seal is always stocked. Minimum order is a bag of 40. Please allow 2 weeks to fill and ship your order.
Made of neoprene rubber, this wall plate gasket fills the gaps between the plate and the wall surface, and between the outlet box and the wall plate, reducing the amount of sound that travels between rooms.
Installing the Box Seal can improve STC outlet values by 7dB, allowing it attain STC-62 or higher.
Two key qualities make it possible: mass and resilience. The neoprene rubber is dense to block sound, but also resilient so it bounces back to dampen sound energy. Other gaskets and sticky putty pads are made of malleable clay which changes and holds shape due to applied pressure (and sound waves), and doesn’t block sound as effectively as neoprene.
The Box Seal has many benefits over products like sealants and putty pads, including:
To put the Box Seal’s effects into context, you can imagine a typical hotel room, which usually shares a wall with an adjacent room and has five recessed outlets on each side. Most hotel chains’ standards require a minimum STC-50 partition. However, with untreated outlets, the effective performance drops to STC-42.
Using a higher STC wall won’t fix the problem, as sound will still pass through the openings created by the outlet.
But simply installing Box Seal increases the performance of the wall by seven decibels.
Increased performance by seven decibels in a hotel with five outlets.
October 7, 2013
April 22, 2016
Blank Box Seal, Blank Pair Box Seal, Decora / Toggle Box Seal
Ft. Meyers, FL
Neoprene, a dense and resilient rubber selected for its ability to isolate vibrations through viscous damping. It is also specially compounded to be Class A fire-rated per ASTM E119.
Performance will always improve by at least 2-3 dB with the Box Seal and as much as 7 dB. The amount is affected by the STC rating of the partition, number of outlets, and the presence of sound attenuation blankets or putty pads.
Yes. The Box Seal spans the wall opening just like the wall plate so that it occupies no space inside the electrical box. Specifically, the requirements of Section 314.16 are unaffected by use of the Box Seal.
NEMA configurations used in the United States, Canada, Mexico, Central America, Colombia, Ecuador, Venezuela and most Caribbean and Pacific Islands. Single-gang and 2-gang arrangements are standard for duplex receptacles, toggle switches, Decora-size openings, and data/TV/phone outlets. Custom configurations are available by special order and pricing. Minimum order quantities (MOQ) will apply.
The standard color is light almond. The edge of the seal is an inconspicuous 1/16-inch thick, and the color blends well with light-colored wall plates. The edge can also be painted once installed.Custom colors are available by special order and pricing. Minimum order quantities will apply.
Box Seals are made to fit flush to the edge of standard-size wall plates and are recommended. Midsize and oversize plates also fit over the Box Seal. Annular space should not exceed 1/8-inch.
Yes, the Box Seal can be used for existing outlets in fire-rated partitions under any conditions. For new outlets, compliance with the “24-inch Rule” of the International Building Code (714.3.2) for protecting recessed outlets on opposite sides of a fire-rated partition is commonly required.
Yes, for fire-rated partitions up to 1-hour for the most common 1-gang duplex configuration. The Box Seal has been tested per UL 1479 and is listed in the Underwriters Laboratories Fire Resistance Directory as a wall opening protective device. Use with a metal wall plate when outlets on opposite sides of a fire-rated partition are less than 24-inches apart.
The Box Seal is available in multiple configurations, including all common NEMA configurations, and fits all major manufacturer's wall plates.
$4.80 per seal
$3.50 per seal
The Duplex Box Seal is certified by Underwriters Laboratories as a wall-opening protective material and listed in the UL Fire Resistance Directory.
Wiring Devices as a Wall Plate Gasket.