Metacaulk 1000 is a 1-component, general fire-rated sealant/smoke seal for construction joints & through-penetrations. Cures to elastomeric seal suited to dynamic motion. Stops flames/smoke/hot gas/water moving through joints & through penetrations. Metacaulk 1000 is a water based, extremely intumescent, non-sag caulking grade sealant that is easy to apply.
Excellent fire rated acoustical sealant & can use in areas with constant vibration/movement. Not designed for use in areas under constant immersion or which would be constantly wet. Not for use against hot uninsulated surfaces above 300F (149C).