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 prevent the spread of flames, smoke, hot gases, and water, providing reliable fire protection for up to 4 hours.

This water-based, VOC-compliant sealant cures to a flexible elastomeric seal, making it ideal for dynamic movement applications. With a non-sag formula, excellent freeze-thaw resistance, mold protection, and a minimum 3-year shelf life, Metacaulk MC 150+ delivers dependable performance for a wide range of interior firestop installations.

Key Features

• Intumescent, one-component firestop sealant.

• Provides up to 4 hours of fire protection.

• Expands during fire exposure to block flames, smoke, hot gases, and water.

• Water-based, VOC-compliant formula.

• Non-sag consistency for easy application.

• Cures to a flexible elastomeric seal.

• Suitable for dynamic movement applications.

• Up to 25% movement capability for control joints.

• Protected against mold growth with biocides.

• Paintable after curing.

• No mixing or dilution required.

• STC rating of 51 for sound control.

• Minimum 3-year shelf life.

• Clean Air Gold Certified.

• Tested to ASTM E814 (UL 1479) and ASTM E1966 (UL 2079).

Common Applications

• Construction joints.

• Vertical and horizontal fire-rated joints.

• Through-penetration firestopping.

• EMT conduit penetrations.

• Power cable penetrations.

• Telephone cable penetrations.

• Concrete floors and walls.

• Gypsum wall assemblies.

• Wood floor assemblies.

• Control joints requiring movement capability.

Product Information

Specification	Details
Product Name	Metacaulk MC 150+ Firestop Sealant
Brand	Metacaulk
Sealant Type	Intumescent fire-rated sealant
Application	Construction joints and through-penetration firestop systems
Color	Red
STC Rating	51
Shelf Life	Minimum 3 Years
Fire Rating	Up to 4 Hours
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-penetration openings in fire-rated wall and floor assemblies.

Q2. How does Metacaulk MC 150+ provide fire protection?
The intumescent formula expands when exposed to heat, helping block the spread of flames, smoke, hot gases, and water through penetrations and joints.

Q3. Can Metacaulk MC 150+ be used in movement joints?
Yes. It cures to a flexible elastomeric seal and accommodates up to 25% joint movement, making it suitable for dynamic applications.

Q4. Does Metacaulk MC 150+ require mixing before use?
No. It is a one-component, ready-to-use sealant that requires no mixing or dilution.

Q5. What fire rating does Metacaulk MC 150+ provide?
Metacaulk MC 150+ provides fire protection for up to 4 hours when installed in approved fire-rated assemblies.