The Metacaulk Cover Guard is a 1-piece fire-rated gasket designed to meet the "24-inch rule" for electrical boxes installed in rated walls.

Metacaulk Cover Guard is a one-piece fire-rated gasket designed to help meet the “24-inch rule” for electrical boxes installed in rated wall assemblies. It provides an effective firestop solution by helping maintain the integrity of fire-rated walls where electrical boxes require additional protection.

When exposed to heat, the intumescent material expands to form a protective char that helps seal openings, prevent flame spread, and limit heat transfer to unexposed areas. Ideal for electrical boxes installed in opposite directions with less than 24 inches of horizontal separation, Metacaulk Cover Guard also provides a solution for standard electrical boxes where the 100-square-inch rule is exceeded.

Key Features

• Intumescent material expands when exposed to heat to form a protective char.

• Helps seal openings and prevent flame spread.

• Designed to help meet the “24-inch rule” for electrical boxes in rated walls.

• Installs inside cover plates for quick and efficient application.

• Installs simultaneously with cover plates to save time and labor.

• Space-saving design does not reduce electrical box volume.

• Provides a practical alternative to traditional putty pads.

• Reduces sound transmission with an STC rating of 54.

• Meets ASTM E814 (UL 1479) standards for firestop systems.

• Suitable for both metal and plastic cover plates.

• Tested for 1-hour and 2-hour fire-rated applications.

Common Applications

• Electrical boxes installed in rated wall assemblies.

• Opposite-facing electrical boxes with less than 24 inches of horizontal separation.

• Standard electrical boxes where the 100-square-inch rule is violated.

• Fire-rated partitions.

• Commercial construction.

• Residential construction.

• Institutional facilities.

• Firestop retrofit applications.

Ideal For

• Electrical box protection.

• Metal cover plates.

• Plastic cover plates.

• Fire-rated wall assemblies.

• New construction projects.

• Renovation and retrofit applications.

Key Benefits

Reliable Fire Protection

The intumescent gasket expands during fire exposure to form a char that helps seal openings, prevent flame spread, and protect the integrity of rated wall assemblies.

Easy Installation

Metacaulk Cover Guard installs inside the cover plate and is installed at the same time as the cover plate, reducing labor requirements and simplifying installation.

Space-Saving Solution

The one-piece gasket design provides fire protection without taking up electrical box volume, making it an efficient alternative to traditional putty pads.

Sound Reduction

With an STC rating of 54, Metacaulk Cover Guard helps reduce sound transmission through electrical box openings and wall assemblies.

Code-Compliant Performance

Designed to meet UL 1479 firestop requirements and tested for approved 1-hour and 2-hour fire-rated applications.

How to Use

Surface Preparation

• Ensure the electrical box and cover plate surfaces are clean and free from debris.

• Verify that the installation follows an approved fire-rated assembly.

• Confirm compatibility with the electrical box and wall system.

Application Instructions

1. Position the Metacaulk Cover Guard inside the cover plate.

2. Install the cover plate with the gasket properly positioned.

3. Ensure the gasket covers the required opening area.

4. Confirm installation complies with the approved firestop system requirements.

Important Notes

• Install only according to tested and approved firestop assemblies.

• Follow manufacturer installation instructions and applicable building codes.

• Verify compatibility with the electrical box and cover plate before installation.

• Designed for passive fire protection applications only.

Product Information

Property	Description
Brand	Metacaulk Cover Guard
Product Type	One-piece fire-rated electrical box gasket
Color	Black
Application	Electrical boxes installed in rated wall assemblies
Fire Protection Method	Intumescent expansion technology
Sound Rating	STC 54
Test Standard	ASTM E814 (UL 1479)
Fire Ratings	Tested for 1-hour and 2-hour applications
Cover Plate Compatibility	Metal and plastic cover plates
Case Weight	2.36 lbs
Case Dimensions	Height: 5.25 in × Length: 4.75 in × Width: 4.50 in
UPC	021449662703
Interleaved	10021449662700

Frequently Asked Questions (FAQ)

Q1. What is Metacaulk Cover Guard?
Metacaulk Cover Guard is a one-piece fire-rated gasket designed to protect electrical boxes installed in rated wall assemblies and help maintain fire resistance.

Q2. What requirement does Metacaulk Cover Guard help satisfy?
It is designed to help meet the “24-inch rule” requirements for electrical boxes installed in fire-rated walls.

Q3. Where is Metacaulk Cover Guard used?
It is used with electrical boxes installed in rated wall assemblies where fire protection requirements apply, including commercial, residential, and institutional applications.

Q4. How does Metacaulk Cover Guard help protect electrical installations?
The fire-rated gasket expands when exposed to heat to help seal openings, reduce flame spread, and maintain the integrity of rated wall assemblies around electrical box penetrations.

Q5. Is Metacaulk Cover Guard a single-piece design?
Yes. It features a one-piece gasket design that allows straightforward installation and reliable fire protection performance.