Metacaulk® Box Guard™ is a one-component fire-rated pad for use in electrical boxes. It is inserted on the inside back wall of an electrical box and is a highly intumescent firestop material. Saves labor costs. Box Guard™ is an economical alternative to putty pads. Great for use on retrofit jobs.
Complies to Required Environmental Testing of Accelerated Aging and High Humidity as per UL 1479 Fire Test of Through-Penetration Firestops. US Patent Number 6,207,085.
Metacaulk® Box Guard™ Features
*Tested in a UL 411 wall assembly/section to ASTM E90.