Metacaulk® Box Guard™ 8 x 4 x 8 in. Double Box Fire Rated Insert

Part #REC66367  |  Manufacturer Part #66367


4 in
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Product Details

  • 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.
  • Highly Intumescent firestop material
  • Non-Conductive, Dielectric Breakdown Voltage 22V/mil (ASTM D 149)
  • A labor saving, economical alternative to putty pads.


ADA Compliant: No

ASTM Specifications: ASTM D-149, ASTM E-119, ASTM E-84, ASTM E-90

Adjustable: No

Collection: Metacaulk® Box Guard™

Color Finish: Black

Color Finish Category: Blacks

ETL Listed: Yes

FM Approved: Yes

Height: 8 in

Length: 4 in

Material: Intumescent

Maximum Temperature: 120

Origin: Domestic

Product Type: Fire Rated Pad

Temperature Range: Up to 120 Deg F

UL Listed: UL 723/UL 411/UL 263/UL 1479

Weight: 1/25

Width: 8 in