Metacaulk 1000 Intumescent Firestop Sealant




Metacaulk® 1000 is a water-based, flexible, highly intumescent sealant designed for use on metal, insulated, fiberglass and plastic pipes. It can also be used for top of the wall construction joints, as well as power and telephone cables.
  • UL Classified Systems up to 4 hrs.
  • High intumescent
  • VOC compliant
  • Excellent freeze-thaw
  • For interior use – paintable
  • Meets ASTM E 814, UL 1479 & UL 2079 standards.
  • STC rating 62
  • Credible for LEED V4.1 & V4, WELL V2, TREES V1.1


Metacaulk® 1000 will prevent the spread of flames, smoke, hot gases and water through joint openings and through-penetrations. No dilution or mixing required for use. No special skills are necessary for installation.

Metacaulk® 1000 has passed ASTM E 1966/UL 2079 for the top of the wall applications with or without backing and as little as 1/4 inch depth of caulk. The test assembly was also subjected to 500 cycles on a specially built machine that successfully demonstrated the product’s durability and movement characteristics.









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