METACAULK FIRE RATED MORTAR is cement compound can ossify, easy at cut or at drill, designed special for fire seal / fire stop. used as passive protection that is arbiter compartment delivers floor or room in power cable stripe and communication. suited for sensitive location likes panel and genset. METACAULK FIRE RATED MORTAR safe in wet and dry places and can prevent grow it mushroom with combination biokid. very safe and easy applied in location.