Metacaulk Box Guard Firestop is a one-component, fire-rated pad for use in electrical boxes. When exposed to fire, it expands and forms a char that seals the opening, preventing flame spread and limiting temperature rise on unexposed surfaces.
Insert it on the inside back wall of an electrical box; it is a highly intumescent firestop material. Metacaulk® Box Guard™ saves labor costs. Box Guard™ is an economical alternative to putty pads. Ideal for use on retrofit jobs.
Metacaulk® Box Guard™ Features
- Easy to Install
- Cost Effective
- Highly Intumescent
- Adheres to the back of the Electrical Box
- Non-Conductive
- Sound Transmission Class (STC) 53
Firestopping Essentials That Work Together
When it comes to passive fire protection, these products are often purchased together to get the job done right:
- Wrap Strips – For sealing penetrations and pipe openings
- Joint Strips – Ideal for construction joints and seams
- Box Guards & Cover Guards– Protect electrical boxes and outlets
- Putty Pads & Sticks – Quick, moldable solutions for tight spaces
Box Guard FirestoppingProduct Information |
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|---|---|---|---|---|
| Product Code | Size | Quantity Per Case | ||
66366 |
Single Box |
50 |
||
66367 |
Double Box |
50 |
||
66369 |
Double for 5.S Box |
50 |
||
Contact us for more information on fire-stopping options.





