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Metacaulk 350i Intumescent Firestop Sealant
Manufacturer RectorSeal Fire Stopping
SKU: 6661

Metacaulk 350i Intumescent Firestop Sealant

Metacaulk® 350i Intumescent Firestop Sealant

Metacaulk® 350i is a one-component general purpose fire rated sealant and smoke seal for construction joints and through-penetrations.  Metacaulk® 350i is a water-based, extremely intumescent, non-sag caulking grade sealant that is suitable where dynamic movement is expected.  In the event of a fire, Metacaulk® 350i will prevent the spread of flames, smoke hot gases and water through joint openings and through-penetrations.  Metacaulk® 350i is easily applied with a conventional caulking gun, bulk loading gun or can be troweled or pumped from the pail.

Metacaulk® 350i systems are rated for 1, 2 and 3 hours in accordance with the ASTM E814 (UL 1479), UL 2079 and ULC-S115-95 test standards.

Various Applications

  • Top of the wall Construction Joints
  • Deflection Track Wall Systems
  • Up to 2" PVC/CPVC (Open)
  • Cross-linked Polyethylene (PEX) tubing
  • Steel, Copper, Cast Iron and EMT Pipe
  • Flexible Conduit
  • Fiberglass Insulated Pipe
  • Armaflex Insulated Pipe
  • Telephone, Communications and Power Cables
  • HVAC Ductwork


Metacaulk 350i Features

  • Highly Intumescent
  • Water Based
  • Excellent Freeze-Thaw
  • Flexible Set
  • Paintable
  • VOC Compliant
  • Safe and Easy to Use
  • Protected against mold and growth
  • Possess intumescent properties; expands when exposed to fire
  • Sound Transmission Class (STC) 53


Learn more about Metacaulk® Fire Stopping Products in this video.


350i Sealant Product Information

Product Code Size Quantity Per Case
10.3 oz Cartridge
20.2 oz Sausage Pack
5 Gallon

Metacaulk 350i Intumescent Firestop Sealant
Metacaulk Leed


Price: $154.85
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