LP FlameBlock Fire-rated OSB U350B

2:21    Commonly used in load-bearing partition walls in multifamily construction, including townhomes. Labor/material cost savings and reduction in dead load due to elimination of a layer of gypsum (vs. WP3820). Cost-effective, space-saving alternative to area separation fire walls using shaft liner (vs. UL375).Sound Transmission Class (STC) rating of 62