What are Wedge Intumescent Fire Door Seal Strips & Sheets?

Wedge Intumescent Fire Door Seal Strips & Sheets are passive fire protection products designed to expand when exposed to heat, sealing gaps in fire-rated doors, windows, glazing systems, service penetrations, and expansion joints. They help block fire, smoke, and hot gases for up to 30–240 minutes, depending on the specification.

What is the difference between INTUR (Rigid) and INTUF (Flexible) Intumescent Fire Seals?

INTUR – Rigid Seals: PVC-encapsulated graphite seals for heavy-duty applications where regular maintenance is difficult. Available in fire-only, fire & smoke, fire & acoustic, and fire & weather-proof versions. INTUF – Flexible Seals: Rubber-free, zero-halogen graphite seals that can bend around curves and irregular gaps, ideal for doors, windows, and structural joints.

Which grades of Wedge Intumescent Fire Seals are available?

INTUR-10, INTUR-14, INTUR-20, INTUR-P (Rigid) and INTUF-10, INTUF-14, INTUF-20 (Flexible), available in widths from 10×2 mm to 40×2 mm strips and sheet sizes up to 1120×2 mm.

How do Wedge Intumescent Fire Seals work?

When exposed to around 200°C, the graphite intumescent material expands up to 20–60× its original volume, sealing gaps and creating a heat-resistant char barrier to stop fire and smoke spread.

Where can these fire seals be used?

They are suitable for fire-rated wooden and steel doors, fire-rated windows and glazing partitions, service penetrations for pipes, cables, and ducts, expansion and structural joints, and railway and industrial applications requiring BS EN 45545 compliance.

What are the main benefits of Wedge Intumescent Fire Seals?

Benefits include fire resistance of 30 to 240 minutes, zero halogen and rubber-free composition for smoke-free performance, high expansion ratio, durability against moisture and mechanical wear, custom colours for rigid PVC models, and long service life up to 50 years for INTUF20 grade.

Can Wedge Intumescent Fire Seals also block smoke and noise?

Yes. Selected INTUR and INTUF variants provide fire + smoke sealing, while some models offer fire + smoke + acoustic or fire + smoke + weather protection.

Are these seals code-compliant?

Yes. Wedge Intumescent Fire Seals are designed to meet international fire safety standards and can be specified to comply with building codes and BS EN standards for fire-rated assemblies.

How are they installed?

Seals are typically supplied with self-adhesive backing for easy installation. Clean the surface, cut to size, remove the backing, and press firmly. Non-adhesive types may require mechanical fixing or frame slotting.

Can I order custom sizes or bulk quantities?

Yes. Wedge India manufactures both standard and custom dimensions for OEM and project needs, with high-MOQ bulk pricing and low-MOQ special orders available.

Intumescent Strips & Door Strips – Fire & Smoke Protection Solutions for Fire Rated Doors

Buy Starting Price Range INR 30 - 50 / Meter for 10x2 and 10/4 mm for INTUF 10 Grade, High-Performance Intumescent Strips for Fire Doors

At Wedge India, we manufacture and supply premium quality Intumescent Strips, Fire Door Strips, and Smoke Seal Door Strips designed to improve fire safety in commercial, industrial, residential, and institutional buildings. Our fire-rated door sealing solutions help prevent the spread of fire, smoke, and toxic gases through door gaps during a fire emergency.

Our intumescent door strips are widely used in:

Fire Rated Wooden Doors
Steel Fire Doors
Glass Fire Doors
Hospital & Hotel Doors
Commercial Buildings
Data Centers
Industrial Plants
Schools & Educational Institutions
Airports & Metro Projects
Warehouses & High-Rise Buildings

Download Catalog for More Details.

What are Intumescent Strips?

Intumescent strips are specially engineered fire protection materials installed around the edges of fire doors and frames. When exposed to high temperatures during a fire, the strip expands many times its original size to seal gaps around the door.

This expansion helps:

Block flames and hot gases
Reduce smoke leakage
Maintain compartmentation
Increase evacuation time
Protect property and lives

These strips are essential components in certified fire door assemblies.

Features of Wedge India Intumescent Door Strips

Superior Fire Resistance: Designed for 30, 60, 90, and 120-minute fire-rated door systems.

Rapid Expansion Technology : Expands instantly under high temperatures to create a powerful fire barrier.

Smoke Protection : Available with integrated cold smoke seals for enhanced life safety.

Durable & Long Lasting : Resistant to aging, moisture, and environmental conditions.

Easy Installation : Available with self-adhesive backing for quick application.

Aesthetic Finish : Supplied in multiple colors and finishes to match modern fire doors.

Types of Intumescent Strips We Offer

1. Fire Door Intumescent Strips

Used in fire-rated door assemblies to seal perimeter gaps during fire exposure.

2. Intumescent Smoke Seals

Combined fire and smoke protection strips with brush or fin smoke seals.

3. Graphite Intumescent Strips

High-expansion graphite-based strips for advanced fire performance.

4. PVC Covered Intumescent Strips

Durable decorative outer covering for clean appearance and protection.

5. Intumescent Door Frame Seals

Installed around frames to maintain complete fire compartment integrity.

6. Fire & Acoustic Door Seals

Specialized strips providing both fire resistance and sound insulation.

Technical Specifications

Parameter	Details
Fire Rating	30 / 60 / 90 / 120 Minutes
Material	Graphite Based Intumescent Core
Covering	PVC / Laminate / Self Adhesive
Sizes Available	10x4 mm, 15x4 mm, 20x4 mm, 25x4 mm & Custom
Colors	Black, Brown, White, Grey, Red
Activation Temperature	Approx. 180°C – 220°C
Application	Wooden & Steel Fire Doors

Applications of Intumescent Door Strips

Our fire-rated door strips are extensively used in:

Fire door manufacturing industries
Construction and infrastructure projects
Commercial office buildings
Hospitals and healthcare facilities
Hotels and hospitality projects
Pharmaceutical plants
Industrial fire safety systems
Public transport infrastructure

Why Choose Wedge India?

Industry Expertise
Leading supplier of passive fire protection materials in India.
Custom Manufacturing
Custom sizes, colors, and branding available.
Quality Assurance
Manufactured using high-quality fire-tested materials.
Pan India Supply
Fast delivery across Delhi NCR, Mumbai, Bengaluru, Hyderabad, Chennai, Kolkata, Lucknow, and all major cities.
Export Capability
Supplying fire protection products to international markets.

Benefits of Installing Fire Door Strips

Enhances fire door performance
Helps comply with fire safety regulations
Reduces smoke inhalation risks
Prevents rapid fire spread
Increases occupant safety
Improves building compartmentation

Available Sizes & Configurations

We offer a wide range of:

10mm Intumescent Strips
15mm Fire Door Seals
20mm Intumescent Smoke Seals
25mm Fire Resistant Door Strips
Single Door & Double Door Solutions
Rebated Door Seals
Surface Mounted Fire Seals

Custom dimensions are also available based on project requirements.

Industries We Serve

Construction Companies
Fire Door Manufacturers
EPC Contractors
HVAC & MEP Contractors
Infrastructure Developers
Government Projects
Railways & Metro Infrastructure
Commercial Real Estate

Intumescent Strips & Door Strips – Fire & Smoke Protection Solutions

What is the purpose of an intumescent strip?

An intumescent strip expands during fire exposure and seals gaps around fire doors to stop flames and smoke from spreading.

Where are intumescent strips installed?

They are installed in the edges of fire doors or door frames.

Are smoke seals necessary with fire doors?

Yes, smoke seals help prevent the movement of toxic smoke, improving safety during evacuation.

What fire ratings are available?

Common ratings include 30-minute, 60-minute, 90-minute, and 120-minute fire resistance.

Can you provide custom sizes?

Yes, custom widths, thicknesses, and colors are available for OEM and project requirements.
List of common fire-resistant systems used in buildings:

Fire-Resistant Walls and Partitions:
   •   Fire-rated gypsum board (drywall)
   •   Concrete or masonry walls
   •   Fire-rated wall assemblies with insulation (mineral wool, fiberglass)

Fire-Resistant Floors and Ceilings:
   •   Concrete slabs
   •   Fire-rated suspended ceilings
   •   Fire-rated flooring systems (steel or timber with fire-resistant coatings)

Fire-Resistant Doors and Windows:
   •   Fire-rated doors (steel, wood, or composite materials)
   •   Fire-rated glass and window assemblies
   •   Fire shutters

Fire-Resistant Roof Systems:
   •   Non-combustible roofing materials (metal, concrete tiles)
   •   Fire-rated roof assemblies

Fireproofing Structural Elements:
   •   Spray-applied fire-resistant materials (SFRM) on steel beams and columns
   •   Intumescent coatings on steel structures
   •   Fireproof concrete encasements

Fire-Resistant Cladding and Facades:
   •   Non-combustible exterior cladding (fiber cement, metal panels)
   •   Fire-resistant insulation (rock wool, foam glass)

Passive Fire Protection Systems:
   •   Fire stops and fire barriers in penetrations and joints
   •   Fire dampers in HVAC systems
   •   Fire-resistant coatings and sealants

Smoke Control and Ventilation:
   •   Smoke curtains
   •   Smoke vents and extraction systems
   •   Pressurized stairwells and escape routes

Intumescent Strips & Door Strips – Fire & Smoke Protection Solutions

Frequently Asked Questions (FAQs)

Wedge Fire Resistant Building Systems