Metacaulk Fire Rated Mortar
Manufacturer RectorSeal Fire Stopping Products
Metacaulk Fire Rated Mortar

Metacaulk® Fire Rated Mortar is a load bearing mortar formulated to economically firestop large openings for through-penetrations in fire rated walls and floors. It can be used with power cables, fiber optic or telephone cables, aluminum or steel cable trays, EMT, copper, steel or cast iron pipe.

Metacaulk® Fire-Rated Mortar is a specially formulated rapid hardening gypsum and cement compound.  The product provides the optimum combination of workability, strength and fire resistance.  When mixed with clean water to a suitable consistency.  It sets without shrinking and can form a rigid, gas-tight, fire-resistant seal.  It can easily be cut or drilled and resealed if future penetrations are needed. 

Metacaulk® Fire Rated Mortar systems are rated for up to 4 hours and have been tested in accordance with ASTM E817 (UL 1479) and ULCS-115-95mtest standards.


  • Wall or floor applications
  • Around metallic pipes (steel, copper, iron, etc)
  • Around Electrical power cables
  • Around communication cables (telephone, fiber optic, etc)
  • Blank openings
  • Concrete or concrete block (CMU) walls
  • Concrete floors
  • Cable Trays (aluminum or steel)

Metacaulk® Fire Rated Mortar Features

  • No sag adjustable consistency
  • High Yield
  • Non-shrinking
  • Safe and simple to use
  • Workable in approximately 45 minutes


Fire Rated Mortar | Product Information

Product Code Size Quantity Per Case
20 lb. Pail
45 lb. Bag

Additional Product Literature
Data Sheet
Safety Data Sheet