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Description: BIOSTOP™ Firestop Gasket 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. STC rating 54, Tested in accordance with ASTM E 90-99.
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