November 2, 2023 INSS1440: Fire Barrier Caulk admin 0 Comment Product List INSS 1440: Fire Barrier Caulk is a single component water based acrylic designed to seal gaps around penetrations. containing single or multiple items. Through the fire rate walls-floor-gaps sealing Tagged on: INSS 1440: Fire Barrier Caulk is a single component water based acrylic designed to seal gaps around penetrations. containing single or multiple items. Through the fire rate walls-floor-gaps sealing