Details
Biostop® BF 150+ is a one-component,
general purpose, fire-rated sealant and
smoke seal for construction joints and
through-penetrations. A water-based,
non-sag caulking grade sealant that is
easy to apply as well as to retrofit. An
economic choice for most common
applications. STC rating 51, Tested in a UL 411
wall assembly/section to ASTM E90.