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Metacaulk MC 150+ Firestop Sealant
The Metacaulk MC 150+ Firestop Sealant is a versatile, intumescent fire-rated sealant designed for construction joints and through-penetration firestop applications. When exposed to fire, it expands to help seal openings and prevent the spread of flames, smoke, hot gases, and water.
This water-based, VOC-compliant sealant cures to a flexible elastomeric seal, making it ideal for dynamic movement applications. With up to 4 hours of fire protection, an STC rating of 51, and a minimum 3-year shelf life, Metacaulk MC 150+ provides reliable performance for interior firestop installations requiring flexibility, durability, and ease of application.
Key Features

Intumescent fire-rated sealant.

Provides up to 4 hours of fire and smoke protection.

Expands under heat to seal openings.

Helps prevent the spread of flames, smoke, and hot gases.

Water-based and VOC compliant.

Non-sag formula for easy application.

No mixing or dilution required.

Cures to a flexible elastomeric seal.

Suitable for dynamic movement applications.

Excellent freeze-thaw resistance.

Protected against mold growth with biocides.

Paintable for interior applications.

Can be applied with a caulking gun, bulk loading gun, trowel, or pump equipment.

Common Applications

Construction joints.

Vertical and horizontal fire-rated joints.

EMT penetrations.

Telephone cable penetrations.

Power cable penetrations.

Concrete floors and walls.

Gypsum wall assemblies.

Wood floor assemblies.

Product Information

Specification
Details

Product Name
Metacaulk MC 150+ Firestop Sealant

Brand
Metacaulk

Color
Gray

STC Rating
51

Shelf Life
Minimum 3 Years

Certifications
ASTM E814 (UL 1479), ASTM E1966 (UL 2079), Clean Air Gold Certified

SKU
Metacaulk-MC-150-Plus-Firestop-Sealant

 
Frequently Asked Questions (FAQ)
Q1. What is Metacaulk MC 150+ used for?Metacaulk MC 150+ is used for firestopping construction joints and through-penetrations in fire-rated wall and floor assemblies.
Q2. How does Metacaulk MC 150+ provide fire protection?The intumescent sealant expands when exposed to heat, helping close openings and prevent the spread of flames, smoke, and hot gases.
Q3. Can Metacaulk MC 150+ be used in movement joints?Yes. It cures to a flexible elastomeric seal and is suitable for dynamic movement applications.
Q4. Does Metacaulk MC 150+ require mixing before use?No. It is a ready-to-use, one-component sealant that requires no mixing or dilution.
Q5. What fire rating does Metacaulk MC 150+ provide?Metacaulk MC 150+ provides up to 4 hours of fire protection when installed in approved tested assemblies.
Brand:MetacaulkSKU:66424Tags:Fire Safety, Firestop SealantsSize:20.2 oz - Case of 12, 5 Gallon Pail