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Metacaulk® MK 1000 Intumescent Firestop Sealant

Features & Benefits

  • One-component, general fire-rated sealant and smoke seal designed for construction applications.
  • Used for sealing construction joints and through-penetrations in fire-rated assemblies.
  • Cures to form an elastomeric seal that accommodates dynamic motion and movement.
  • Effectively stops flames, smoke, hot gases, and water from moving through joints and penetrations.
  • Protected in wet & dry stages against mold growth with a combination of biocides.
  • Non-sag caulking grade sealant that is easy to apply & retrofit. Water Based and Flexible Set with a Minimum 3 Year Shelf Life. Excellent freeze-thaw and For interior use — paintable.
  • Safe and Easy to Use. No dilution or mixing is required for use. No special skills necessary to install. Apply with a conventional caulking gun, bulk loading gun or trowel from the pail. For large applications, can be pumped directly from the pail.
  • Highly intumescent and VOC compliant.
  • Systems rated for 1, 2, 3, & 4 hours in accordance with ASTM E 814, UL 1479 UL 2079 & CAN/ULC-S115 standards. STC rating 62.

Unit of Measure: Cartridge, Sausage