Metacaulk 1000 is an intumescent, water-based firestop sealant that will prevent the spread of flames, smoke, hot gases, and water through joint openings and through-penetrations. No dilution or mixing required. Can be used in areas under constant vibration and movement. Use in fire-rated gypsum wallboard partitions, concrete walls or floors, wood floors and concrete or corrugated steel deck floor, ceiling assemblies. Recommended for metal, fiberglass & plastic pipes, wall construction joints, power and telephone cables. Tested to ASTM G21 mold inhibitor. Sound Transmission Class (STC) rating 62. (ASTM E90) VOC compliant. 3 year shelf life. Meets ASTM E814, Standard Test Method for fire tests of Penetration Firestop Systems.