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.