Metacaulk® Fire Rated Mortar is a specially formulated rapid hardening gypsum/cement compound. The product provides the optimum combination of workability, strength and fire resistance. When mixed with clean water to a suitable consistency, Metacaulk® Fire Rated Mortar sets without shrinking and can form a rigid, gas tight, fire resistant seal. It can easily be cut or drilled and resealed if future penetrants are needed. No special tools are required to mix or install the product.

Metacaulk® Fire Rated Mortar systems are rated for up to 4 hours and has been tested in accordance with ASTM E 814 (UL 1479) and ULC-S115-95 test standards. Metacaulk® Fire Rated Mortar is protected in a wet stage as well as in a dry stage against mold growth with a combination of biocides.

A fire rated load bearing mortar to economically firestop large openings for through penetrations in fire rated walls and floors. Can be used with power cables, fiber optic telephone cables. Recommended for use with aluminum or steel cable trays, as well as EMT, copper, steel, or black iron pipe. Use Metacaulk® Fire Rated Mortar for various applications:
  • Wall or floor applications
  • Around metallic pipes (steel, copper, iron, etc.)
  • Around electrical power cables
  • Around communication cables (telephone, fiber optic, etc.)
  • Blank openings


  • Non-sag Adjustable consistency (pourable or trowelable)
  • High yield
  • Non-shrinking
  • Safe and simple to use
  • Workable approximately 45 minutes.


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