Authorized Metacaulk® Distributor(732) 757-4552
Guards
Metacaulk Box Guard
Single component, highly intumescent graphite-based insert for inside electrical boxes. Pre-installed adhesive tape for easy friction-fit installation. Expansion ratio 1:20. Up to 2-hour fire resistance. STC 53.
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UL-Classified SystemsComponents of tested UL firestop systems
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Authorized DistributorGenuine Metacaulk® / RectorSeal
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TDS & SDSFull technical documentation
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Same-Day ShippingOrder by 11 AM CST
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Spec & Submittal SupportCode & system help
Key features
- UL Classified systems up to 2 hours
- Friction-fit inside standard electrical boxes
- Available: single, double, and 4-11/16" sizes
- Non-conductive, Flame Spread 0, Smoke Index 20
- STC Rating 53
Typical applications
- Inside metallic electrical boxes
- switch boxes
- junction boxes in fire-rated assemblies
Technical data
| VOC | <10 g/L |
|---|---|
| Color | Black |
| Chemical Base | Graphite based on Synthetic compound |
| STC Rating | 53 |
| Smoke Index | 20 |
| Flame Spread | 0 |
| Expansion Ratio | 1:20 |
Installation overview
- Clean all contact surfaces
- Remove protective paper from adhesive tape
- Stick pad to inside back wall of electrical box, center from top and bottom
- If needed, create max 3/8" hole for ground screw access
- Install switch or outlet