Metacaulk Box Guard is a one-component, fire-rated intumescent pad designed to help maintain the fire-resistance of electrical boxes installed in fire-rated wall assemblies.

When exposed to high temperatures, the pad expands to form a protective char that seals openings, helping prevent the spread of flames and smoke while reducing heat transfer to the unexposed side of the wall.

Designed for quick, peel-and-stick installation, Metacaulk Box Guard adheres directly to the back of electrical boxes without the need for putty or specialized tools. It is an economical solution for both new construction and retrofit applications.

Key Features

• One-component intumescent fire-rated electrical box pad.
• Expands during fire exposure to form a protective insulating char.
• Helps prevent the spread of flames and smoke.
• Maintains the integrity of fire-rated wall assemblies.
• Peel-and-stick installation with no special tools required.
• Adheres directly to the back of electrical boxes.
• Cost-effective alternative to traditional firestop putty pads.
• STC 53 sound rating for improved acoustic performance.
• UL Listed and tested to ASTM E814 (UL 1479).
• Non-conductive with dielectric breakdown voltage of 22V/mil (ASTM D149).
• Suitable for new construction and retrofit applications.

Common Applications

• Electrical outlet boxes.
• Fire-rated gypsum walls.
• Commercial construction.
• Residential construction.
• Healthcare facilities.
• Educational buildings.
• Office buildings.
• Renovation and retrofit projects.
• Fire-rated partition systems.

Ideal For

• Electrical outlet boxes.
• Switch boxes.
• Fire-rated wall assemblies.
• Commercial electrical installations.
• Residential electrical installations.

Key Benefits

Reliable Fire Protection

The intumescent pad expands during fire exposure to help maintain the fire-resistance of electrical box installations.

Fast, Tool-Free Installation

The peel-and-stick design installs quickly without mixing, putty, or specialized tools.

Improved Sound Control

An STC rating of 53 helps reduce sound transmission through fire-rated wall assemblies.

Code-Compliant Solution

Designed to help meet firestop requirements, including NEC 314.16 and other applicable building codes when installed in approved systems.

Cost-Effective Performance

Provides a labor-saving alternative to traditional putty pads while maintaining reliable fire protection.

How to Use

Surface Preparation

• Ensure the electrical box is clean, dry, and free of dust or debris.
• Verify the installation complies with the approved fire-rated assembly.
• Use only in tested and approved configurations.

Installation

1. Remove the protective backing from the Metacaulk Box Guard pad.
2. Apply the pad directly to the inside back panel of the electrical box.
3. Press firmly to ensure complete adhesion.
4. Complete the electrical installation according to applicable codes and approved firestop details.

Important Notes

• Install only in approved and tested fire-rated assemblies.
• Follow all applicable electrical and building codes.
• Use only as recommended by RectorSeal.
• Always verify compatibility with the intended fire-rated wall system.
• Store in a clean, dry location before installation.

Product Details

• Brand: Metacaulk Box Guard
• Color: Black
• Case Weight: 11.04 lbs
• Case Dimensions: 4.63" H × 7.25" L × 9.00" W
• UPC: 021449663694

Frequently Asked Questions (FAQ)

Q1. What is Metacaulk Box Guard used for?

Metacaulk Box Guard is used to help maintain the fire rating of electrical boxes installed in fire-rated wall assemblies.

Q2. How does Metacaulk Box Guard work?

When exposed to fire, the intumescent pad expands to form a protective char that helps block the spread of flames, smoke, and heat.

Q3. Does Metacaulk Box Guard require special tools for installation?

No. The peel-and-stick design installs directly onto the back of the electrical box without additional tools or putty.

Q4. Can Metacaulk Box Guard improve sound insulation?

Yes. It has an STC rating of 53, helping reduce sound transmission through wall assemblies.

Q5. Is Metacaulk Box Guard suitable for retrofit projects?

Yes. It is ideal for both new construction and retrofit applications, offering a quick and cost-effective firestop solution.