Intumescent Strips | Fire Door Seals | Fire & Smoke Seals Manufacturer in India

High Performance Intumescent Fire Strips for Fire Doors, Frames, Glazing & Passive Fire Protection

Protect lives and buildings with MG Materials Intumescent Strips, engineered to seal gaps in fire-rated doors, door frames, glazing systems, access panels, service penetrations and construction joints during a fire.

Our graphite-based intumescent fire strips rapidly expand when exposed to temperatures above approximately 180–220°C, creating a highly insulating char that blocks the passage of flames, hot gases and smoke while helping maintain the integrity of fire-rated assemblies. Intumescent seals typically expand many times their original thickness when exposed to fire.

Whether you require Fire Only, Fire & Smoke, Acoustic Fire Seals, PVC Covered Intumescent Strips, Flexible Intumescent Sheets, or OEM customized fire sealing solutions, MG Materials offers complete passive fire protection solutions.

What are Intumescent Strips?

Intumescent strips are passive fire protection products installed inside fire-rated doors and frames. Under normal conditions they remain stable and invisible.

During a fire, the graphite-based intumescent material expands significantly, sealing the clearance between the door and frame to:

Prevent flame spread
Block hot gases
Reduce smoke leakage
Maintain compartmentation
Improve evacuation time
Protect property and lives

They are one of the most critical components of certified fire door systems.

How Intumescent Fire Strips Work

Installed inside door edge or frame groove
Remain inactive during normal operation
Activated by high temperature
Expand rapidly
Seal door gaps completely
Prevent passage of fire and smoke
Maintain fire door integrity for its certified fire rating

Product Features

✔ High Expansion Graphite Technology

✔ Fire Ratings:

30 Minutes
60 Minutes
90 Minutes
120 Minutes

✔ Available with Smoke Seals

✔ Acoustic Performance

✔ Weather Resistant Options

✔ Self Adhesive Backing

✔ PVC Covered Rigid Version

✔ Flexible Intumescent Strip

✔ Zero Halogen Grades Available

✔ Long Service Life

✔ Easy Installation

✔ Custom OEM Manufacturing

Types of Intumescent Strips

1. Rigid Intumescent Strips

Designed for:

Fire doors
Steel doors
Wooden doors
Commercial buildings
Hospitals
Airports
Metro projects

Benefits

PVC covered
Excellent durability
Mechanical protection
Decorative finish
Easy installation

2. Flexible Intumescent Strips

Suitable for:

Door hardware
Hinges
Locks
Fire dampers
Expansion joints
Glazing systems
Service penetrations
OEM fire protection products

Benefits

Highly flexible
Excellent expansion
Easy cutting
Can wrap around hardware
Superior char formation

3. Fire & Smoke Seals

Provides:

Fire protection
Cold smoke sealing
Reduced toxic smoke movement
Improved occupant safety

Available with:

Brush seals
Fin seals
Neoprene seals

4. Acoustic Fire Seals

Ideal where both:

Fire protection
Sound insulation

are required.

Commonly used in:

Hotels
Hospitals
Offices
Educational buildings
Recording studios

Technical Specifications

MaterialGraphite Based Intumescent

Fire Rating30 / 60 / 90 / 120 Minutes

Activation TemperatureApprox. 180–220°C

ExpansionMulti-directional High Expansion

Available Widths10, 15, 20, 25, 30 mm & Custom

Thickness2 mm, 4 mm & Custom

LengthStandard & OEM

MountingSelf Adhesive / Non Adhesive

CoveringPVC / Flexible / Custom

ColoursBlack, Brown, White, Grey, Red

ApplicationsWooden & Steel Fire Doors

Available Sizes

Standard widths

10 mm
15 mm
20 mm
25 mm
30 mm

Available Thickness

2 mm
4 mm
Custom

Custom sizes available for OEM manufacturers.

Applications

Our Intumescent Fire Seals are widely used in:

Fire Rated Doors
Steel Fire Doors
Wooden Fire Doors
Fire Door Frames
Hospital Doors
Hotel Doors
Schools
Airports
Metro Stations
Commercial Buildings
High Rise Buildings
Data Centres
Industrial Plants
Warehouses
Fire Rated Windows
Access Panels
Lift Doors
Electrical Cabinets
Fire Dampers
HVAC Systems
Cable Penetrations
Pipe Fire Protection
Expansion Joints

Industries Served

Construction
Fire Protection
Building Materials
Infrastructure
Railways
Metro Projects
Airports
Healthcare
Hospitality
Industrial Manufacturing
Data Centres
Government Projects

Advantages of MG Materials Intumescent Strips

Manufactured using premium graphite technology
Reliable expansion under fire conditions
Excellent smoke sealing performance
Easy installation
Long service life
Custom manufacturing capability
OEM private label manufacturing
Bulk supply available
Technical support
Fast delivery across India and international markets

Why Choose MG Materials?

MG Materials supplies passive fire protection products designed for architects, fire door manufacturers, EPC contractors, builders, OEMs and distributors.

We offer:

Consistent quality
Competitive pricing
Project supply capability
OEM manufacturing
Technical assistance
Export supply
Customized dimensions
Bulk production

Frequently Asked Questions (FAQs)

What is an intumescent strip?

An intumescent strip is a passive fire protection material that expands under high temperatures to seal gaps around fire doors and prevent the spread of fire and smoke.

Where are intumescent strips installed?

They are installed inside grooves in: