Metacaulk® 1000 Intumescent Firestop Sealant

Metacaulk® 1000 Intumescent Firestop Sealant


  • 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
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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. Sound Transmission Class (STC) rating 62, Tested in a UL 411 wall assembly/section to ASTM E90.

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.



FBC™ System Compatible indicates that this product has been tested, and is monitored on an ongoing basis, to assure its chemical compatibility with Flowguard Gold®, Blazemaster® and Corzan® piping systems and products made with TempRite® Technology.

The FBC System Compatible Logo, FBC™, FlowGuard Gold®, BlazeMaster®, Corzan® and TempRite® are trademarks of Lubrizol Advanced Materials, Inc. or its affiliates.

Product Codes And Case Sizes
Product CodeSizeQuantityUPCInterleavedDimensionsCubic Feet
66640 10.3oz cartridge 12 021449666404 10021449666401 8x6x12 .34
66312 20.2oz Sausage Pk. 12 021449663120 10021449663127 9x14x7 .51
66303 30oz cartridge 12 021449663038 10021449663035 11x9x17 .97
66309 5 Gallon 1021449663090 NA13 diax14 1.08