Metacaulk Putty Pads

DESCRIPTION: Moldable, non-curing, single-component, intumescent pliant in pad form for through-penetration systems.


  • Intumescent expands at the exposure of heat, forming a refractory char that tightly seals preventing the spread of flame, smoke and toxic fumes
  • For interior use with various penetrations (cabling, EMT pipe, conduit, etc.); no volatile solvents (particularly useful when installing in confined spaces or occupied areas); does not have asbestos fillers
  • Easy to install; applied by hand; no curing time; adheres to all common building surfaces
  • Helps provide a barrier or buffer for energized bus ducts or conduits as well as provide a barrier from vibration and movement; no additional putty material needed to plug end of each electrical metallic tube or conduit as its connection to the box
  • Required by Building Codes in rated partitions where horizontal separation of opposite facing electrical boxes is under 24 inches

PERFORMANCE: UL Classified system up to 3 hrs; tested in accordance with ASTM E814 (UL 1479) and ASTM E119 (UL 263); STC Rating 60; only 1/8″ thickness needed for 1-2 hr fire rating; tested by a third party independent laboratory to the ASTM G21 standard with Fungal Growth Rating results of zero


Membrane Penetration

Revit Details


Metacaulk Putty Pads Through Penetration

Product Variations

  • 66335 - Metacaulk Fire-Rated Putty Pads, 7" X 7"
  • 66340 - Metacaulk Fire-Rated Putty Pads, 6" X 7"
  • 66475 - Metacaulk Fire-Rated Putty Pads, 9" X 9"



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