How to buy an original 3M Fire Barrier Sealant in India?

Purchase this 3M Fire Barrier Sealant CP 25WB+ from crowcrowcrow.com. It is sourced directly from authorized US retailers, factory-sealed, and imported per-order. All customs duties and GST are included in the listed INR price, and delivery is via ExpressBox tracked service for authenticity and transparency.

Is this fire barrier caulk suitable for sealing gaps around pipes and cables?

Yes, this fire barrier caulk is designed for through-penetration firestop applications, such as sealing gaps where pipes, conduits, and cables pass through fire-rated walls and floors. It provides up to 4 hours of fire, smoke, and toxic gas protection when installed according to listed assembly systems.

Can I apply this with a standard caulking gun and paint over it?

Yes, this product is supplied in a standard 10.1 fl oz (300ml) cartridge compatible with a common caulking gun. It is water-based, sag-resistant, paintable, re-enterable, and repairable, making application and clean-up straightforward.

What is the fire rating and sound transmission class (STC) for this sealant?

This sealant is tested and listed for up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115 standards. It also provides an L-Rating for smoke seal and achieves an STC rating of 54 when tested in a STC 54-rated wall assembly.

Is this sealant safe for use in Indian buildings?

This product is tested to international standards like UL 1479. While it provides reliable firestopping, it is crucial to verify its acceptability against local Indian building and fire codes (IS/NBC) for your specific project. Imported specialty products may have different cost structures due to duties.

What are the side effects of using this sealant?

This product is for industrial/occupational use only and not for consumer sale. It contains lead, requiring adherence to safety protocols and California Proposition 65 warnings. Ensure proper ventilation and personal protective equipment during application. It is not intended for direct skin contact or consumer use.

3M Red 10.1 fl oz Sealant | Fire Barrier Caulk for India

About this item

3M Fire Barrier Sealant CP 25WB+ is a high-performance, one-component, latex-based, intumescent sealant designed for through-penetration firestop applications. It dries to form a monolithic firestop seal, controlling the spread of fire, smoke, and noxious gases for up to 4 hours when installed correctly. This sealant also acts as a barrier to airborne sound transmission, with an STC rating of 54 when tested in a suitable wall assembly.

This sag-resistant, water-based sealant offers strong adhesion to a wide range of construction substrates and penetrants. Applied with conventional caulking equipment, it requires no mixing and is paintable, re-enterable, and repairable, ensuring easy application and clean-up. It expands a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C).

For industrial/occupational use only. Imported from authorized US retailers, all customs duties and GST are included in the listed price. Delivery via ExpressBox tracked service. Check local building codes for specific application requirements.

Key Features

TESTED AND LISTED: Up to 4-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115. Provides L-Rating (smoke seal)
STC RATING OF 54: When tested in a STC 54-rated wall assembly
PREMIUM INTUMESCENT LATEX SEALANT: For use as a one-part fire, smoke, toxic gas sealant in a non-halogen formula
SPECIALLY ENGINEERED: Sag-resistant properties offer clean application as well as strong adhesion in both wall and floor applications
WATER-BASED SEALANT: Easy application sealant is paintable, re-enterable and repairable with easy clean-up
SOUND BARRIER: Sealant acts as a barrier to help minimize airborne sound transmission
For industrial/occupational use only. Not for consumer sale or use.

Why choose this product

Trusted Firestop Science

3M Fire Barrier Sealant CP 25WB+ leverages advanced intumescent technology, expanding significantly when exposed to heat to create a robust seal. This USA-sourced sealant is formulated to control fire, smoke, and toxic gas spread, offering reliable protection tested to rigorous ASTM E814 (UL 1479) standards. Unlike generic fillers, its specific chemical composition ensures long-term performance and adhesion to diverse construction materials, providing peace of mind for critical safety applications.

Ideal For Professional & Industrial Use

This sealant is best suited for industrial/occupational use in through-penetration firestop applications, such as sealing around pipes, cables, and HVAC ducts in fire-rated walls and floors. It is not intended for consumer sale or use. If you require a general-purpose sealant for non-fire-rated applications or consumer DIY projects, a standard silicone or acrylic caulk would be more appropriate. Ensure compatibility with your specific building codes and assembly requirements.

How to use

Ensure the through-penetration or joint is clean, dry, and free of debris. Remove any excess dust or loose material to ensure optimal adhesion for the sealant. — Prepare the Opening
Load the 10.1 fl oz (300ml) cartridge into a standard caulking gun. Apply the sealant evenly into the gap or around the penetrant, ensuring complete fill and good contact with all surfaces. — Apply the Sealant
Tool the sealant with a damp cloth or tool to create a smooth finish. Allow the sealant to cure according to manufacturer instructions before painting or further construction. It is re-enterable and repairable. — Tool and Cure

Example scenarios

Typical situations where 3M Fire Barrier Sealant CP 25WB+ 300ml (10.1 fl oz) | Tested to 4-Hour Fire Rating helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A construction project in Mumbai requires sealing cable penetrations through a fire-rated wall to meet building safety standards.

How this product helps

Using 3M Fire Barrier Sealant CP 25WB+ ensures up to 4 hours of fire and smoke protection, tested to UL 1479. Its intumescent property expands to seal gaps, preventing fire spread and meeting stringent safety requirements for critical infrastructure.

Scenario 2

Illustrative example

Where it helps

An architect in Delhi needs to install HVAC ducts through a fire-rated floor assembly and requires a sealant that also dampens noise.

How this product helps

This 3M sealant offers both firestopping (up to 4 hours) and sound dampening (STC 54). Its sag-resistant, gun-grade application is easy for contractors, and its paintable, repairable nature simplifies long-term building maintenance.

Specifications & installation

Specifications

Type	One-Component, Latex-Based, Intumescent
Halogen-Free	Yes
Scent	Unscented
Expansion Ratio	Minimum 3x dried volume

Installation & usage

Application	Gun-grade, for through-penetrations and construction joints
Fire Rating	Up to 4 hours (ASTM E814 / UL 1479)
Sound Transmission Class (STC)	54 (in STC 54-rated wall assembly)
Temperature Resistance	Expands above 1000°F (538°C)
Shelf Life After Opening	900 days (approx. 30 months)
Cost per use	300 ml cartridge at 1 ml/day = 300 days: ₹7.54 per day
Contraindications	Not for consumer sale or use; not for general-purpose sealing.
Allergens / Common Irritants	Contains lead (California Proposition 65 warning)

How we compare

Feature	3M Fire Barrier	Others
Fire Rating	Up to 4 hours (ASTM E814 / UL 1479)	Varies by brand; check for IS/NBC compliance and hour rating (e.g., 1-2 hours common)
Intumescent Property	Expands up to 3x volume in fire	May be intumescent or passive; expansion properties vary
Sound Barrier (STC)	STC 54 rating	Typically not specified or lower STC ratings
Application & Repair	Paintable, re-enterable, repairable, sag-resistant	Paintability and repairability vary; some may be difficult to re-enter
Cost per Cartridge	300 ml cartridge — ₹7.54 per ml	Typically ₹300-700 per 300ml cartridge, depending on brand and rating

SKU	mgp1730
GTIN	00051115116384
Brand	3M
Model Name	CP 25WB+
Color	Red
Item Form	Paste
Material	Latex-Based
Size	300 ml (10.1 fl oz) Cartridge
Weight	0.55 lb (0.25 kg)
Dimensions	2 in x 12 in x 2 in (5 cm x 28.3 cm x 4.7 cm)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers

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3M Fire Barrier Sealant CP 25WB+ 300ml (10.1 fl oz) | Tested to 4-Hour Fire Rating

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