Is a single component fire rated gasket for use with electrical boxes when addressing the “24 inch rule”. BIOSTOP® Firestop Gasket is applied by hand, does not take up volume in the electrical box and is a labor saving replacement for putty pads in normal applications. Patent Pending. Sound Transmission Class (STC) Rating 54*. Complies to Required Environmental Exposure Testing of Accelerated Aging and High Humidity as per UL 1479 Fire Test of Through-Penetration Firestops.
US Patent No. 6,207,085; 6,252,167 & 7,348,484
Tested in a UL 411 wall assembly/section to ASTM E90.
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