Material selection
Choose graphite intumescent strips for high expansion needs; pair with a separate smoke seal when ambient smoke control is required.
DRAWING-BASED CUSTOM PARTS
Graphite Intumescent Fire Door Seals
Adhesive-backed graphite strips engineered to expand under heat and close perimeter gaps around fire-rated door assemblies.
Custom intumescent seal strips for fire doors and access panels, supplied in application-specific profiles and adhesive formats.
Engineered Graphite Intumescent Fire Door Seals
Graphite intumescent seals are installed around door frames, glazing or penetrations. When exposed to elevated heat, the graphite compound expands to help close gaps and reduce the path for fire and hot gases. The final performance depends on the complete tested door or panel assembly.
Material approach
Expandable graphite can generate substantial expansion volume at fire temperatures while remaining compact during normal service.
Key features
- Heat-activated expansion
- adhesive-backed installation
- strip
- roll and profile supply
- compatible smoke-seal combinations
- custom sizing.
Custom Specifications
Typical values for reference only. Final material grade, tolerance and dimensional capability are confirmed after drawing review.
| Material | Expandable graphite intumescent compound |
|---|---|
| Thickness range | 1-10 mm |
| Typical thickness | 2-4 mm |
| Size range | 5-100 mm strip widths; cut lengths to drawing |
| Temperature range | Expansion range depends on the selected compound and tested assembly |
| Hardness range | Not normally specified by Shore hardness |
| Tolerance | Typically +/-0.30 mm width and thickness by strip grade |
| Standards | Fire performance must be demonstrated by the applicable local test standard for the full assembly, such as EN 1634, UL 10C or BS 476 where required. |
MATERIAL SELECTION
Graphite Intumescent Fire Door Seals Material Comparison
Use this as a starting point only; the selected grade and construction are confirmed against the drawing and application.
| Material | Primary strength | Selection focus | Best fit |
|---|---|---|---|
| Graphite intumescent strip | Expandable graphite can generate substantial expansion volume at fire temperatures while remaining compact during normal service. | Choose graphite intumescent strips for high expansion needs; pair with a separate smoke seal when ambient smoke control is required. | Fire-rated timber or steel doors, access hatches, service risers, glazing systems and compartmentation details. |
| sodium-silicate intumescent materials | Expansion onset, expansion ratio, density and facing options are selected for the tested system requirements. | Choose graphite intumescent strips for high expansion needs; pair with a separate smoke seal when ambient smoke control is required. | Fire-rated timber or steel doors, access hatches, service risers, glazing systems and compartmentation details. |
| PVC smoke seals and combined fire/smoke seal systems. | Expansion onset, expansion ratio, density and facing options are selected for the tested system requirements. | Choose graphite intumescent strips for high expansion needs; pair with a separate smoke seal when ambient smoke control is required. | Fire-rated timber or steel doors, access hatches, service risers, glazing systems and compartmentation details. |
PRODUCT EXAMPLES
Custom Part Gallery
CONVERTING OPTIONS
Manufacturing & Finish Options
Use only within the door, frame or penetration system for which the configuration has been evaluated and approved.
Custom Material Slitting
Specified strip widths and sheet conversion for downstream assembly.
Custom Material Slitting →Adhesive Backing
PSA and liner constructions selected for the mating surface and assembly method.
Adhesive Backing →Industrial Laminating
Layered material constructions developed as a complete assembly.
Industrial Laminating →Custom Gasket Prototyping
Sample parts for fit, material and assembly validation before production.
Custom Gasket Prototyping →DESIGN REVIEW
Engineering Guide
Practical points to include when selecting foam and preparing a drawing for review.
Geometry and thickness
Locate the strip according to the tested door detail and maintain the specified perimeter gap; do not obstruct intended expansion space.
Assembly performance
The strip is a component, not a universal fire rating. Verify compatibility with the door core, frame, hardware and governing code.
Production route
Use only within the door, frame or penetration system for which the configuration has been evaluated and approved.
Applications / Where It Fits
Custom intumescent seal strips for fire doors and access panels, supplied in application-specific profiles and adhesive formats. The final specification is established around the drawing and operating requirements.
When This Part May Not Be the Best Choice
Standalone certification claims outside a tested assembly, wet or exterior exposure without a compatible facing, or applications needing elastic weather sealing only.
Alternative parts to consider
Electrical Cabinet Door SealsCustom T-Shaped Rubber Door and Window SealsCustom Molded Silicone SealsPROJECT DELIVERY
Manufacturing Capabilities
Available options are confirmed against the selected material, drawing and order requirements.
| Capability | Options |
|---|---|
| Manufacturing process | Slitting, die cutting, adhesive coating, laminating and profile converting |
| Adhesive options | High-tack acrylic PSA, transfer adhesive and non-adhesive mechanical-retention options. |
| Surface options | Bare graphite, PVC-faced, foil-faced, paintable or smoke-seal integrated profiles. |
| Custom options | Width, thickness, expansion grade, facing, adhesive, roll length, precut lengths and integrated smoke fin. |
| Standards | Fire performance must be demonstrated by the applicable local test standard for the full assembly, such as EN 1634, UL 10C or BS 476 where required. |
Drawing Requirements
Recommended drawing formats
Please include
- tested assembly detail
- frame or door geometry
- gap location
- strip position and required compliance pathway
For a precise graphite intumescent fire door seals quotation, provide tested assembly detail, frame or door geometry, gap location, strip position and required compliance pathway.
Frequently Asked Questions
Do intumescent strips seal smoke at room temperature?
Graphite strips activate with heat; an integrated or separate smoke seal is needed where ambient smoke or air leakage control is required.
Can I cut the strip to length on site?
Many products can be cut cleanly, but follow the installation detail for joins, corners and end treatment.
Does the adhesive alone provide the fire rating?
No. Fire performance is determined by the complete tested assembly, including the strip location and installation.
Can the strip be used on steel doors?
Compatible configurations are available, but selection must follow the tested steel-door assembly requirements.
What should a drawing include for graphite intumescent fire door seals?
Include tested assembly detail, frame or door geometry, gap location, strip position and required compliance pathway.
Can graphite intumescent fire door seals be supplied for production assembly?
Yes. Use only within the door, frame or penetration system for which the configuration has been evaluated and approved. Delivery format, liner configuration and packaging are specified for the assembly workflow.
How is the right graphite intumescent fire door seals construction selected?
Choose graphite intumescent strips for high expansion needs; pair with a separate smoke seal when ambient smoke control is required. The drawing and operating conditions establish the final construction.
CONTINUE YOUR RESEARCH
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DRAWING-BASED MANUFACTURING
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