Passive Fire Protection
Intumescent Sealants
Shop fire-rated intumescent sealants for joints, gaps and service penetrations within fire-rated walls and floors.
Find acrylic, graphite and specialist fire stopping sealants from leading passive fire protection manufacturers, with technical support available if you are unsure which product is suitable for your application.
Fire Protection Direct
Need help choosing a fire sealant?
The correct sealant depends on the substrate, service type, joint or aperture size and the relevant tested fire stopping detail.
Intumescent Sealants
Shop Intumescent Sealants
Browse our range of fire-rated sealants currently available from Fire Protection Direct for penetration seals, joints, gaps and other passive fire protection applications.
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FAS Fire Door Foam 750ml Gun Grade – Box of 12
£176.88 inc VAT Add to basket -
FAS Fire Door Intumescent Acrylic Sealant 310ml
From £3.63 Add to basket This product has multiple variants. The options may be chosen on the product page -
FIREFLY® FR Graphite High-Expansion Sealant 310ml
From £7.68 Add to basket This product has multiple variants. The options may be chosen on the product page -
FIREFLY® FR Intumescent Acrylic Sealant 310ml
From £3.12 Add to basket This product has multiple variants. The options may be chosen on the product page -
Nullifire FS702 Intumastic Fire-Resistant Acrylic Sealant 310ml
From £2.52 Add to basket This product has multiple variants. The options may be chosen on the product page -
Nullifire FS709 HP Graphite Intumescent Sealant 310ml
From £8.25 Add to basket This product has multiple variants. The options may be chosen on the product page -
Nullifire FS719 HP Blue CPVC Fire Sealant 310ml – Box of 25
From £8.38 Add to basket This product has multiple variants. The options may be chosen on the product page -
PFC Corofil CAIS Acoustic Intumescent Sealant
Add to basket -
Quelfire QuelStop HPE Graphite Intumescent Sealant 310ml
£9.45 inc VAT Add to basket -
Quelfire QuelStop Intumescent Acoustic Acrylic Sealant 310ml
£3.36 inc VAT Add to basket -
Protecta FR Acrylic Fire-Rated Sealant 310ml
From £2.42 Add to basket This product has multiple variants. The options may be chosen on the product page -
ROCKWOOL FirePro AIS Acoustic Intumescent Sealant 310ml
From £2.58 Add to basket This product has multiple variants. The options may be chosen on the product page
Fire Stopping Sealants
Sealing Joints, Gaps & Service Penetrations
Intumescent sealants are used within passive fire protection systems to seal joints, gaps and openings where services pass through fire-rated walls and floors.
When exposed to high temperatures, intumescent materials react and expand. Within an appropriate tested system, this can help close openings and restrict the passage of fire, smoke and hot gases.
The correct product depends on the service, substrate, dimensions and tested installation detail rather than the sealant type alone.
Common applications
- Service penetrations
- Cable penetrations
- Pipe penetrations
- Linear joints and gaps
- Perimeter and construction joints
Product Types
Different Types of Fire Stopping Sealant
Fire stopping sealants are available in different formulations for different services and applications.
Intumescent Acrylic Sealants
Fire-rated acrylic sealants are commonly used for joints, gaps and a range of service penetration applications where permitted by the relevant tested system.
Graphite Sealants
Graphite-based intumescent sealants provide an expanding fire stopping material for applications where the tested system requires greater intumescent action.
Fire & Acoustic Sealants
Some systems combine fire stopping performance with acoustic sealing requirements. Always check the stated application and supporting product documentation.
Specification
Choosing the Right Intumescent Sealant
Check the complete fire stopping detail rather than selecting a sealant on description or fire rating alone.
Substrate
Check the wall, floor or supporting construction specified by the tested system.
Service Type
Cables, pipes, joints and other penetrations may require different products and installation details.
Joint or Aperture
Check the permitted gap, joint width, seal depth and surrounding penetration dimensions.
Tested Detail
Confirm the selected sealant and installation method against the manufacturer's relevant documentation.
Manufacturers
Intumescent Sealant Brands
Explore fire stopping sealants from passive fire protection manufacturers available through Fire Protection Direct.
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Related Fire Protection Products
Browse complementary passive fire protection products commonly used across penetration and compartmentation systems.
Technical Guidance
Fire sealants form part of a complete tested system
The sealant, substrate, backing material, joint or aperture dimensions, service type and installation depth can all affect the performance of a fire stopping detail.
Always check the relevant manufacturer's installation instructions and supporting technical documentation before installation or substituting one sealant for another.
What information should I provide?
If you need help locating a suitable product, it helps to provide:
- Wall or floor construction
- Service or joint type
- Aperture or gap dimensions
- Required fire resistance
- Any existing system details
Frequently Asked Questions
Intumescent Sealants FAQs
Intumescent sealants are passive fire protection products used to seal joints, gaps and service penetrations within fire-rated walls and floors. They help maintain compartmentation by restricting the passage of fire, smoke and hot gases.
Intumescent sealants contain materials that react when exposed to high temperatures. Depending on the product and application, the material expands to help close gaps and openings within the fire stopping system.
Intumescent sealants are commonly used around service penetrations, cables, pipes, construction joints, perimeter gaps and other openings within fire-rated walls and floors.
Some intumescent acrylic sealants can be painted once cured. Always check the relevant manufacturer technical documentation for the specific product before applying a finish.
Selection depends on the application, service type, substrate, joint or aperture dimensions, required fire resistance and the relevant tested installation detail.
Intumescent Sealants
Need help choosing an intumescent sealant?
Browse our fire stopping sealant range or speak to Fire Protection Direct for help identifying the relevant product information and manufacturer documentation.
