Metacaulk Box Guard - Single Electrical Box Insert

Metacaulk Box Guard is a 1-component fire-rated pad for use in electrical boxes. When exposed to fire, it will expand forming a char that seals the opening, prevents spread of flames & limits temperature rise on unexposed surfaces.

• Metacaulk Box Guard is applied by hand, and must comply with NEC 314.16 (formerly 370.16) or other applicable codes. STC 53 Rating, Tested in a UL 411 wall assembly/section to ASTM E90.
  
• Easy to Install- Adheres to Back of Electrical Box. Cost Effective and Great for retrofit jobs.
  
• ASTM E814 (UL 1479)
  
• Non-Conductive, Dielectric Breakdown Voltage 22V/mil (ASTM D 149)
  
• A labor saving, economical alternative to putty pads.